Physiological Responses to Drought Stress of Five Speciesfrom Catalpa Scop

doi:10.7525/j.issn.1673-5102.2021.01.006

Abstract

Abstract:

In order to analyze the response to drought stress of the five species of Catalpa Scop.， to provide theoretical basis for the selection on drought-resistant breeding and cultivation of drought-resistant tree species of Catalpa Scop.， the C.speciosa， C.fargesii f.duclouxii， C.fargesii， C.ovata， and C.bungei were selected as materials， and cultivated for 50 days under the water conditions of 700 and 400 mL respectively， and seedling height， diameter， leaf water potential， relative content of chlorophyll， chlorophyll fluorescence parameters， and specific leaf weight were measured respectively. The membership function method was used to comprehensively evaluate drought resistance. The results showed that the C.bungei grew best but the C.ovata was relatively poorest under the two water conditions. Under drought stress， except for the C.speciosa， the leaf water potential（Ψ_L） of all other species decreased， and the maximum stomatal conductance（G_s） increased respectively. The relative chlorophyll content（SPAD） of different species increased under drought stress. The maximum light energy conversion efficiency（F_v/F_m） of photosystem Ⅱ of each species increased under drought stress， except for C.fargesii f.duclouxii and C.bungei. In addition to C.fargesii， the specific leaf weight（LMA） of other tree species increased under drought stress. The results of comprehensive drought resistance using the membership function method were gray C.fargesii>C.ovata>C.fargesii f.duclouxii>C.bungei>C.speciosa. The results showed that different species of Catalpa Scop. have different drought resistance. Comprehensive analysis showed that the drought resistance of C.bungei and C.fargesii were strong， and that of C.fargesii f.duclouxii and C.ovata were the second， and that of C.speciosa was the worst.

Key words: Catalpa Scop., drought stress, physiological response, difference

CLC Number:

S792.21

Xiao-Chi YU, Gui-Juan YANG, Ju-Lan DONG, Jun-Hui WANG, Wen-Jun MA, Peng ZHANG. Physiological Responses to Drought Stress of Five Speciesfrom Catalpa Scop[J]. Bulletin of Botanical Research, 2021, 41(1): 44-52.

Figures/Tables 6

Fig.1

Table 1

Table 2

Fig.2

Table 3

Table 4

References 50

1	Khan A，Anwar Y，Hasan M M，et al.Attenuation of drought stress in Brassica seedlings with exogenous application of Ca²⁺ and H₂O₂［J］.Plants（Basel），2017，6（2）：20-33.
2	刘文瑜，何斌，杨发荣，等.不同品种藜麦幼苗对干旱胁迫和复水的生理响应［J］.草业科学，2019，36（10）：2655-2665.
	Liu W Y，He B，Yang F R，et al.Physiological response to drought and re-watering of different quinoa varieties［J］.Pratacultural Science，2019，36（10）：2655-2665.
3	Graciano C，Guiamet J J，Goya J F.Fertilization and water stress interactions in young Eucalyptus grandis plants［J］.Canadian Journal of Forest Research，2006，36（4）：1028-1034.
4	Gessler A，Schaub M，Mcdowell N G.The role of nutrients in drought-induced tree mortality and recovery［J］.New Phytologist，2017，214（2）：513-520.
5	Ma S C，Li F M，Yang S J，et al.Effects of root pruning on non-hydraulic root-sourced signal，drought tolerance and water use efficiency of winter wheat［J］.Journal of Integrative Agriculture，2013，12（6）：989-998.
6	Kagotani Y，Nishida K，Kiyomizu T，et al.Photosynthetic responses to soil water stress in summer in two Japanese urban landscape tree species（Ginkgo biloba and Prunus yedoensis）：effects of pruning mulch and irrigation management［J］.Trees，2016，30（3）：697-708.
7	Giuggiola A，Bugmann H，Zingg A，et al.Reduction of stand density increases drought resistance in xeric Scots pine forests［J］.Forest Ecology and Management，2013，310：827-835.
8	Winter S R，Musick J T，Porter K B.Evaluation of screening techniques for Breeding drought-resistanct winter wheat［J］.Crop Science，1988，28（3）：512-516.
9	Wright I J，Reich P B，Cornelissen J H C，et al.Modulation of leaf economic traits and trait relationships by climate［J］.Global Ecology and Biogeography，2005，14（5）：411-421.
10	Lawlor D W，Cornic G.Photosynthetic carbon assimilation and associated metabolism in relation to water deficits in higher plants［J］.Plant，Cell & Environment，2002，25（2）：275-294.
11	Galmés J，Medrano H，Flexas J.Photosynthetic limitations in response to water stress and recovery in Mediterranean plants with different growth forms［J］.New Phytologist，2007，175（1）：81-93.
12	Chaves M M，Flexas J，Pinheiro C.Photosynthesis under drought and salt stress：regulation mechanisms from whole plant to cell［J］.Annals of Botany，2009，103（4）：551-560.
13	郑雨，赵玉文，费文群，等.干旱胁迫下西藏2种牡丹幼苗叶绿素含量和光合特征比较［J］.高原农业，2018，2（5）：453-461，557.
	Zheng Y，Zhao Y W，Fei W Q，et al.Comparison of chlorophyll content and photosynthetic characteristics of 2 species of Plateau Paeonia seedlings under drought stress［J］.Journal of Plateau Agriculture，2018，2（5）：453-461，557.
14	张曦，王振南，陆姣云，等.紫花苜蓿叶性状对干旱的阶段性响应［J］.生态学报，2016，36（9）：2669-2676.
	Zhang X，Wang Z N，Lu J Y，et al.Responses of leaf traits to drought at different growth stages of alfalfa［J］.Acta Ecologica Sinica，2016，36（9）：2669-2676.
15	王良桂，张春霞，彭方仁，等.干旱胁迫对几种楸树苗木叶片荧光特性的影响［J］.南京林业大学学报：自然科学版，2008，32（6）：119-122.
	Wang L G，Zhang C X，Peng F R，et al.Effects of drought stress on the fluorescence characteristics of four type of Catalpa spp.［J］.Journal of Nanjing Forestry University：Natural Science Edition，2008，32（6）：119-122.
16	谭春燕，杨文钰，陈佳琴，等.干旱胁迫下大豆种质资源的生理响应及抗旱性评价［J］.分子植物育种，2020，18（4）：1349-1356.
	Tan C Y，Yang W Y，Chen J Q，et al.The physiological response and drought resistance assessment of soybean germplasm resources under drought stress［J］.Molecular Plant Breeding，2020，18（4）：1349-1356.
17	赵燕，李吉跃，刘海燕，等.水分胁迫对5个沙柳种源苗木水势和蒸腾耗水的影响［J］.北京林业大学学报，2008，30（5）：19-25.
	Zhao Y，Li J Y，Liu H Y，et al.Effect of different water supply on water potentinal and transpiring water-consumption of five Salix psammophila provenances［J］.Journal of Beijing Forestry University，2008，30（5）：19-25.
18	王丁，姚健，杨雪，等.干旱胁迫条件下6种喀斯特主要造林树种苗木叶片水势及吸水潜能变化［J］.生态学报，2011，31（8）：2216-2226.
	Wang D，Yao J，Yang X，et al.Changes of leaf water potential and water absorption potential capacities of six kinds of seedlings in Karst mount area under different drought stress intensities：taking six forestation seedlings in karst Mountainous region for example［J］.Acta Ecologica Sinica，2011，31（8）：2216-2226.
19	司建华，冯起，张小由.极端干旱区胡杨水势及影响因子研究［J］.中国沙漠，2005，25（4）：505-510.
	Si J H，Feng Q，Zhang X Y.Leaf water potential of Populus euphratica and influencinge factors in extreme arid region［J］.Journal of Desert Research，2005，25（4）：505-510.
20	中国植物志编委会.中国植物志［M］.北京：科学出版社，2005：13-18.
	Editorial Board of Flora of China.Flora of China［M］.Beijing：Science Press，2005：13-18.
21	潘庆凯，康平生，郭明.楸树［M］.北京：中国林业出版社，1991：14-15.
	Pan Q K，Kang P S，Guo M.Catalpa［M］.Beijing：China Forestry Press，1991：14-15.
22	England J R，Attiwill P M.Changes in leaf morphology and anatomy with tree age and height in the broadleaved evergreen species，Eucalyptus regnans F.Muell［J］.Trees，2006，20（1）：79-90.
23	马红英，吕小旭，计雅男，等.17种锦鸡儿属植物叶片解剖结构及抗旱性分析［J］.水土保持研究，2020，27（1）：340-346，352.
	Ma H Y，Lv X X，Ji Y N，et al.Leaf anatomical structure and drought resistance of 17 Caragana species［J］.Research of Soil and Water Conservation，2020，27（1）：340-346，352.
24	Sperry J S，Hacke U G，Oren R，et al.Water deficits and hydraulic limits to leaf water supply［J］.Plant，Cell & Environment，2002，25（2）：251-263.
25	周欢欢，傅卢成，马玲，等.干旱胁迫及复水对‘波叶金桂’生理特性的影响［J］.浙江农林大学学报，2019，36（4）：687-696.
	Zhou H H，Fu L C，Ma L，et al.Physiological characteristics of Osmanthus fragrans ‘Boyejingui’ with drought stress and rewatering［J］.Journal of Zhejiang A&F University，2019，36（4）：687-696.
26	张军，王建波，陈刚，等.Na₂CO₃胁迫下星星草幼苗叶片电解质外渗率与PSⅡ光能耗散的关系［J］.草业学报，2009，18（3）：200-206.
	Zhang J，Wang J B，Chen G，et al.The relationship between electrolyte leak and light energy dissipation of PSⅡ in the leaves of Puccinellia tenuiflora seedlings under Na₂CO₃ stress［J］.Acta Prataculturae Sinica，2009，18（3）：200-206.
27	谢东锋，王华田，张光灿，等.山杏苗木对干旱胁迫的生理响应［J］.中国水土保持科学，2019，17（4）：122-129.
	Xie D F，Wang H T，Zhang G C，et al.Physiological responses of Prunus sibirica seedlings to drought stress［J］.Science of Soil and Water Conservation，2019，17（4）：122-129.
28	Oren R，Sperry J S，Katul G G，et al.Survey and synthesis of intra- and interspecific variation in stomatal sensitivity to vapour pressure deficit［J］.Plant，Cell & Environment，1999，22（12）：1515-1526.
29	杨睿智，马景永，梁椿烜，等.基于液流和叶片水势测定的沙柳水分利用特征分析［J］.北京林业大学学报，2019，41（11）：87-94.
	Yang R Z，Ma J Y，Liang C X，et al.Analyses on water use characteristics of Salix psammophila based on sap flow and leaf water potential［J］.Journal of Beijing Forestry University，2019，41（11）：87-94.
30	张栋.干旱胁迫对苹果光合作用和叶绿素荧光的影响及叶片衰老特性研究［D］.杨凌：西北农林科技大学，2011.
	Zhang D.Effects of drought stress on photosynthesis and fluorescence chlorophyll parameters of apple leaves and leaf senescence characteristics［D］.Yangling：Northwest University of Agriculture and Forestry Science and Technology，2011.
31	Yordanov I，Tsonev T，Goltsev V，et al.Interactive effect of water deficit and high temperature on photosynthesis of sunflower and maize plants.1.Changes in parameters of chlorophyll fluorescence induction kinetics and fluorescence quenching［J］.Photosynthetica，1997，33（3）：391-402.
32	陈振，元慕田，曹琪琪，等.土壤含水量对苜蓿和沙棘气孔导度与叶水势的影响［J］.中国水土保持科学，2019，17（2）：37-43.
	Chen Z，Yuan M T，Cao Q Q，et al.Effects of soil water content on stomatal conductance and leaf water potential of Medicago sativa and Hippophae rhamnoides［J］.Science of Soil and Water Conservation，2019，17（2）：37-43.
33	李晓清，胡学煜，左英强，等.水分胁迫对希蒙得木幼苗生物量的影响［J］.西南林学院学报，2009，29（5）：19-22，27.
	Li X Q，Hu X Y，Zuo Y Q，et al.Effect of water stress on biomass allocation of Simmondsia chinensis seedlings［J］.Journal of Southwest Forestry University，2009，29（5）：19-22，27.
34	郭丽，梁俊林，赵永辉，等.四川省3种乡土树种幼苗对干旱胁迫的光合生理响应［J］.四川农业大学学报，2017，35（4）：516-522.
	Guo L，Liang J L，Zhao Y H，et al.Photosynthetic physiological response to drought stress of three native tree species seedlings in Sichuan［J］.Journal of Sichuan Agricultural University，2017，35（4）：516-522.
35	赵天宏，沈秀瑛，杨德光，等.水分胁迫及复水对玉米叶片叶绿素含量和光合作用的影响［J］.杂粮作物，2003，23（1）：33-35.
	Zhao T H，Shen X Y，Yang D G，et al.Effects on chlorophyll content and photosynthetic rate of maize leaves under water stress and rewatering［J］.Rain Fed Crops，2003，23（1）：33-35.
36	Ögren E.Evaluation of chlorophyll fluorescence as a probe for drought stress in willow leaves［J］.Plant Physiology，1990，93（4）：1280-1285.
37	Anjum S A，Xie X Y，Wang L C，et al.Morphological，physiological and biochemical responses of plants to drought stress［J］.African Journal of Agricultural Research，2011，6（9）：2026-2032.
38	Zhang X L，Zang R G，Li C Y，et al.Population differences in physiological and morphological adaptations of Populus davidiana seedlings in response to progressive drought stress［J］.Plant Science，2004，166（3）：791-797.
39	陈坤荣，王永义.加勒比松耐旱性生理特征研究［J］.西南林学院学报，1997，17（4）：9-15.
	Chen K R，Wang Y Y.A Study on physiological characteristics of drought resistance of Pinus caribaea［J］.Journal of Southwest Forestry College，1997，17（4）：9-15.
40	Costa C，Dwyer L M，Dutilleul P，et al.Inter-relationships of applied nitrogen，SPAD，and yield of leafy and non-leafy maize genotypes［J］.Journal of Plant Nutrition，2001，24（8）：1173-1194.
41	Wang Y Z，Hong W，Wu C Z，et al.Variation of SPAD values in uneven-aged leaves of different dominant species in Castanopsis carlessi forest in Lingshishan National Forest Park［J］.Journal of Forestry Research，2009，20（4）：362-366.
42	何炎红，郭连生，田有亮.7种针阔叶树种不同光照强度下叶绿素荧光猝灭特征［J］.林业科学，2006，42（2）：27-31.
	He Y H，Guo L S，Tian Y L.Chlorophyll fluorescence quenching characteristics of seven coniferous and broadleaved species in different light intensities［J］.Scientia Silvae Sinicae，2006，42（2）：27-31.
43	胡启鹏，郭志华，李春燕，等.不同光环境下亚热带常绿阔叶树种和落叶阔叶树种幼苗的叶形态和光合生理特征［J］.生态学报，2008，28（7）：3262-3270.
	Hu Q P，Guo Z H，Li C Y，et al.Leaf morphology and photosynthetic characteristics of seedlings of a deciduous and an evergreen broad-leaved species under different light regimes in subtropical forests［J］.Acta Ecologica Sinica，2008，28（7）：3262-3270.
44	汤飞洋，金荷仙，唐宇力.不同程度干旱胁迫对4个杜鹃品种叶绿素荧光参数的影响［J］.西北林学院学报，2017，32（5）：64-68，108.
	Tang F Y，Jin H X，Tang Y L.Effects of different drought stress on chlorophyll fluorescence of four Rhododendron Cultivars［J］.Journal of Northwest Forestry University，2017，32（5）：64-68，108.
45	赵丽英，邓西平，山仑.渗透胁迫对小麦幼苗叶绿素荧光参数的影响［J］.应用生态学报，2005，16（7）：1261-1264.
	Zhao L Y，Deng X P，Shan L.Effects of osmotic stress on chlorophyll fluorescence parameters of wheat seedling［J］.Chinese Journal of Applied Ecology，2005，16（7）：1261-1264.
46	郑淑霞，上官周平.不同功能型植物光合特性及其与叶氮含量、比叶重的关系［J］.生态学报，2007，27（1）：171-181.
	Zheng S X，Shangguan Z P.Photosynthetic characteristics and their relationships with leaf nitrogen content and leaf mass per area in different plant functional types［J］.Acta Ecologica Sinica，2007，27（1）：171-181.
47	Witkowski E T F，Lamont B B.Leaf specific mass confounds leaf density and thickness［J］.Oecologia，1991，88（4）：486-493.
48	刘金环，曾德慧，Lee D K.科尔沁沙地东南部地区主要植物叶片性状及其相互关系［J］.生态学杂志，2006，25（8）：921-925.
	Liu J H，Zeng D H，Lee D K.Leaf traits and their interrelationships of main plant species in southeast Horqin sandy land［J］.Chinese Journal of Ecology，2006，25（8）：921-925.
49	李善家，苏培玺，张海娜，等.荒漠植物叶片水分和功能性状特征及其相互关系［J］.植物生理学报，2013，49（2）：153-160.
	Li S J，Su P X，Zhang H N，et al.Characteristics and relationships of foliar water and leaf functional traits of desert plants［J］.Plant Physiology Journal，2013，49（2）：153-160.
50	Ma W J，Yang G J，Xiao Y，et al.ABA-dependent K⁺ flux is one of the important features of the drought response that distinguishes Catalpa from two different habitats［J］.Plant Signaling & Behavior，2020，15（4）：1559-2324.

树种 Species	叶片水势Ψ_L（MPa）		气孔导度G_s(mmol·m^-2·s^-1)
树种 Species	700 mL	400 mL	700 mL	400 mL
黄金树C.speciosa	-3.32±0.72a	-2.83±0.21a	269.0±128.4a	447.2±69.2a
梓树C.ovata	-2.72±0.27a	-3.16±0.11ab	362.2±63.6a	199.0±90.3b
灰楸C.fargesii	-2.92±0.52a	-3.39±0.45ab	313.9±171.0a	226.8±144.5b
滇楸C.fargesii f.duclouxii	-2.88±0.62a	-3.85±0.92b	219.9±61.2a	198.8±90.5b
楸树C.bungei	-3.18±0.36a	-5.29±0.23c	300.5±41.9a	204.6±74.3b

时间 Time	黄金树 C.speciosa		梓树 C.ovata		灰楸 C.fargesii		滇楸 C.fargesii f.duclouxii		楸树 C.bungei
时间 Time	700 mL	400 mL	700 mL	400 mL	700 mL	400 mL	700 mL	400 mL	700 mL	400 mL
6:30	85.8	90.2	89.4	50.1	105.2	108.1	169.2	119.7	86.9	73.7
8:30	216.3	242.0	288.4	185.9	254.2	251.1	369.8	253.8	287.5	246.4
10:30	269.0	447.2	362.2	199.0	313.9	226.8	300.5	204.6	219.9	198.8
12:30	173.1	254.4	229.5	92.1	179.9	205.6	189.4	117.7	191.2	25.5
14:30	120.8	115.9	170.1	98.6	136.6	87.2	158.7	65.2	57.0	23.9
16:30	106.8	148.1	195.8	81.4	135.0	91.9	136.2	79.3	54.7	41.6
18:30	206.3	92.0	107.2	72.4	111.5	90.9	163.2	83.3	88.0	47.3

树种 Species	最大光能转化效率F_v/F_m		比叶重LMA（mg·cm^-2）
树种 Species	700 mL	400 mL	700 mL	400 mL
黄金树C.speciosa	0.821±0.002a	0.825±0.014b	0.004 1±0.000 5b	0.004 1±0.000 2b
梓树C.ovata	0.826±0.010a	0.829±0.009b	0.004 4±0.000 4b	0.004 9±0.000 2b
灰楸C.fargesii	0.818±0.009a	0.823±0.010b	0.006 7±0.000 5a	0.006 4±0.001 3a
滇楸C.fargesii f.duclouxii	0.848±0.003a	0.846±0.004b	0.004 0±0.000 4b	0.004 4±0.000 3b
楸树C.bungei	0.801±0.057a	0.797±0.021a	0.004 3±0.001 1b	0.004 6±0.000 4b

树种 Species	隶属函数值Subordinative function					综合评价D值 Evaluation D
树种 Species	叶绿素相对含量 SPAD	气孔导度 G_s	叶片水势 Ψ_L	比叶面积 LMA	最大光能转化效率 F_v/F_m	综合评价D值 Evaluation D
黄金树C.speciosa	2.820	2.899	2.827	2.833	2.835	0.022
梓树C.ovata	3.144	3.299	3.160	3.176	3.180	0.039
灰楸C.fargesii	3.373	3.543	3.387	3.400	3.403	0.040
滇楸C.fargesii f.duclouxii	3.832	4.011	3.847	3.862	3.865	0.037
楸树C.bungei	5.269	5.440	5.290	5.311	5.315	0.025

[1]	Jie LI, Jingli ZHANG, Timei SUN, Tian BAI, Yingmin LÜ, Fenyong LI, Yawen WU. Trait Evaluation and Hybrid Compatibility of Seven Rhododendron Species [J]. Bulletin of Botanical Research, 2025, 45(6): 928-938.
[2]	Zhaoxin HE, Lianfeng WU, Yongzhe WANG, Yunjie GU, Fengwei ZHAO, Xingchang WANG, Xiaochun WANG. Spatio-temporal Pattern of Aboveground Biomass in Daqing Grassland and Its Relationship with Climatic Factors [J]. Bulletin of Botanical Research, 2025, 45(1): 34-44.
[3]	Chu HUANG, Mingyue HE, Meile SUN, Yanhong CHEN, Huizhen WANG. Silicon-mediated Regulation on Polysaccharides Synthesis of Codonopsis pilosula under Drought Stress Based on EMP and TCA cycle Pathways [J]. Bulletin of Botanical Research, 2025, 45(1): 98-110.
[4]	Yuping LIU, Mingjun YU, Yu ZHANG, Xu SU, Xiaoli LI, Qian YANG, Xueli LIU. Cloning and Drought Tolerance Functional Validation of PvAQP Gene in Psammochloa villosa (Poaceae) [J]. Bulletin of Botanical Research, 2024, 44(6): 914-925.
[5]	Xinyi YU, Huiyue JI, Pingping LU, Jiayu ZHOU, Hai LIAO. The Bioinformatic Analysis on the Plant Isopentenyl Pyrophosphate Isomerase [J]. Bulletin of Botanical Research, 2024, 44(5): 774-782.
[6]	Yuanyuan SUN, Tianqi YANG, Xingmei AI, Haoran LI, Caibao ZHAO, Xuan ZHANG. Relationship Between the Differences in Leaves Morphology and Structure and Epiphyllous Bud Development of Tropical Water Lily before and after Leaf Expansion [J]. Bulletin of Botanical Research, 2024, 44(4): 528-539.
[7]	Xiaoqian WU, Xu HE, Jinghui GAO, Shuang LI. Germplasm Innovation and Characteristic Analysis of Transgenic PsnNAC007Populus simonii×P. nigra with High Drought Tolerance [J]. Bulletin of Botanical Research, 2024, 44(3): 349-360.
[8]	Jing ZHANG, Weixi ZHANG, Changjun DING, Zhengsai YUAN, Lirui DAI, Xiaohua SU, Yingbai SHEN, Guanzheng QU. Comparative Analysis of Growth, Photosynthetic Physiology and Root Tip Ion Flow Characteristics of Five Poplar Varieties [J]. Bulletin of Botanical Research, 2024, 44(1): 96-106.
[9]	Yue REN, Cheng WEI, Tiantian XU, Hailong SHEN, Ling YANG. Effects of Cryopreservation on Physiological and Biochemical Characteristics of Fraxinus mandshurica Embryos [J]. Bulletin of Botanical Research, 2023, 43(3): 396-403.
[10]	Bin WEI, Yi LI, Shiping SU. The Effect of Exogenous Proline on the Stomata of Nitraria tangutorum Leaves under Natural Drought [J]. Bulletin of Botanical Research, 2022, 42(3): 492-501.
[11]	Feng HE, Hong-Yan DU, Pan-Feng LIU, Lu WANG, Jun QING, Lan-Ying DU. Effects of Drought Stress on Leaf Structure of Eucommia ulmoides [J]. Bulletin of Botanical Research, 2021, 41(6): 947-956.
[12]	Ying WANG, Hong-Bo XU, Yang WANG, Meng-Qian WANG, Cheng-Zhong WANG, Yuan-Sen YIN, Xue SUN, Hui ZHOU, Li-Huan ZHUO. Difference of Tolerance to Heavy Metal Zinc Stress of Five Sedum Plants [J]. Bulletin of Botanical Research, 2021, 41(6): 982-992.
[13]	Shuang-Hui TIAN, He CHENG, Yang ZHANG, Cong LIU, De-An XIA, Zhi-Gang WEI. Genome-wide Identification and Expressional Analysis of Carotenoid Cleavage Dioxygenases(CCD) Gene Family in Populus trichocarpa under Drought and Salt Stress [J]. Bulletin of Botanical Research, 2021, 41(6): 993-1005.
[14]	Dong ZHANG, Yan LIU, Han ZHANG, Zi-Jian ZHANG, Yang WANG, Mei-Cen LIU. Response of Photosynthesis and Leaf Morphological Characteristics to Drought Stress in Glycyrrhiza uralensis [J]. Bulletin of Botanical Research, 2021, 41(3): 449-457.
[15]	Wen-Hai HU, Xiao-Hong YAN, Xiao-Hong LI, Zao-Gui CAO. Effects of 24-Epibrassinolide on the Chlorophyll Fluorescence Transient in Leaves of Pepper under Drought Stress [J]. Bulletin of Botanical Research, 2021, 41(1): 53-59.