植物研究 ›› 2021, Vol. 41 ›› Issue (1): 44-52.doi: 10.7525/j.issn.1673-5102.2021.01.006
于晓池1, 杨桂娟2, 董菊兰3, 王军辉2, 麻文俊2, 张鹏1
收稿日期:
2020-05-06
出版日期:
2021-01-20
发布日期:
2021-01-05
作者简介:
于晓池(1996—),女,硕士研究生,主要从事森林培育研究。
基金资助:
Xiao-Chi YU1, Gui-Juan YANG2, Ju-Lan DONG3, Jun-Hui WANG2, Wen-Jun MA2, Peng ZHANG1
Received:
2020-05-06
Online:
2021-01-20
Published:
2021-01-05
About author:
YU Xiao-Chi(1996—),femal,master,mainly engaged in forest cultivation research.
Supported by:
摘要:
为分析梓属5个种干旱胁迫响应程度,为梓属耐旱树种的筛选、抗旱育种及栽培工作提供理论依据。本研究选取梓属的黄金树、滇楸、灰楸、梓树和楸树为试材,将其在浇水量为700 mL和400 mL的水分条件下培养50 d,测量其苗高、地径、叶水势、叶绿素相对含量、叶绿素荧光参数和比叶重等指标,并运用隶属函数法对其抗旱性进行综合评价。结果表明:在2种水分条件下,生长状态最好的为楸树,梓树相对较差。在干旱胁迫条件下,除黄金树外,其他各树种的叶片水势(ΨL)都降低,最大气孔导度(Gs)均增加。不同种的叶绿素相对含量(SPAD)值均在干旱胁迫条件下升高。除滇楸和楸树外,各树种的光系统Ⅱ最大光能转换效率(Fv/Fm)随干旱胁迫而增加。除灰楸外,干旱胁迫增加了其他树种的比叶重(LMA)。利用隶属函数法综合评价抗旱性的结果为:灰楸>梓树>滇楸>楸树>黄金树。说明梓属不同树种间有着不同的抗旱能力。综合分析,楸树和灰楸的抗旱能力较强,滇楸和梓树的抗旱能力次之,黄金树的抗旱能力最差。
中图分类号:
于晓池, 杨桂娟, 董菊兰, 王军辉, 麻文俊, 张鹏. 梓属5个种对干旱胁迫的生理响应[J]. 植物研究, 2021, 41(1): 44-52.
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.
表1
各个种在不同水分梯度下叶片水势和气孔导度的变化
树种 Species | 叶片水势ΨL(MPa) | 气孔导度Gs(mmol·m-2·s-1) | |||
---|---|---|---|---|---|
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 |
表2
干旱胁迫下不同种气孔导度日变化趋势
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 | |||||
---|---|---|---|---|---|---|---|---|---|---|
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 |
表3
各个种在2种水分条件下比叶重和最大光能转化效率的变化
树种 Species | 最大光能转化效率Fv/Fm | 比叶重LMA(mg·cm-2) | |||
---|---|---|---|---|---|
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 |
表4
干旱胁迫下各树种隶属函数值和综合评价D值
树种 Species | 隶属函数值Subordinative function | 综合评价D值 Evaluation D | ||||
---|---|---|---|---|---|---|
叶绿素相对含量 SPAD | 气孔导度 Gs | 叶片水势 ΨL | 比叶面积 LMA | 最大光能转化效率 Fv/Fm | ||
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 |
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