Comparative Analysis of Growth, Photosynthetic Physiology and Root Tip Ion Flow Characteristics of Five Poplar Varieties

doi:10.7525/j.issn.1673-5102.2024.01.012

Abstract

Abstract:

To provide reference for early selection of fast-growing and adaptable varieties， the difference in growth， photosynthetic physiology， and root tip ion flux were analyzed among in five poplar varieties. The annual seedlings of Populus × euramericana ‘Bofeng 3’， P. × euramericana ‘Bofeng 1’， P. × euramericana ‘Xixiong 1’， P. × euramericana ‘Zhongxiong 7 ’， and P. deltoides × P. suaveolens cl. ‘Zhongxiong 4’ were selected as materials. Growth indexes including plant height and ground diameter were measured at 0 and 30 days under normal culture conditions， respectively. Leaf number， single leaf area， leaf length， leaf width， photosynthetic parameters including P_n， C_i， G_s， T_r， SPAD and K⁺， Ca²⁺， H⁺ ion flux of roots were measured at 10， 20 and 30 days， respectively. Under 30 days normal management， There were significant differences in plant height growth among the five varieties， from high to low， it was ‘Zhongxiong 4’， ‘Xixiong 1’， ‘Bofeng 3’， ‘Zhongxiong 7’ and ‘Bofeng 1’. Among them， the photosynthetic characteristics and transpiration rate of ‘Bofeng 1’ were the largest， and those of ‘Zhongxiong 4’ were the smallest. However， the single leaf area（（57.49±2.37） cm²）， total leaf area（（1 721.10±28.59） cm²）， net photosynthetic rate （（17 863.10± 910.21） μmol·m^-2·s^-1） and water utilization rate（（3.15±0.06）μmol·mmol^-1） of ‘Zhongxiong 4’ were significantly decreased. were the largest. The efflux velocity of K⁺ was the slowest（（62.68±0.45） pmol·cm^-2·g^-1）， and the influx velocity of Ca²⁺ was the fastest（（-74.24±1.29） pmol·cm^-2·g^-1）. The net photosynthetic rate （（8 539.70±164.64） μmol·m^-2·s^-1） and water utilization rate（（2.64±0.07） μmol·mmol^-1） of ‘Bofeng 1’ were the lowest， and the outflow velocity of K⁺ was（130.81±1.71） pmol·cm^-2·g^-1. The Ca²⁺ influx velocity（（-34.43±0.84） pmol·cm^-2·g^-1） was the slowest. In summary， among the five varieties， ‘Zhongxiong 4’ might have potential strong environmental adaptability， with the highest total leaf area， P_nand WUE， the lowest T_r， the smallest K⁺ efflux， largest Ca²⁺ influx of and most active H⁺of root tip， and best plant height growth performance， which might be suitable for planting a wider range.

Key words: poplar varieties, growth difference, photosynthesis, transpiration, apical ion flow rate

CLC Number:

S722.3⁺6

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.

Figures/Tables 9

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品种名称 Varieties Name	株高 Plant height/cm	地径 Ground diameter/mm	叶片数量/枚 Number of blades	节间距 Section spacing/cm
渤丰3号杨 P.×euramericana ‘Bofeng 3’	45.58	5.14	20	2.23
渤丰1号杨 P.×euramericana ‘Bofeng 1’	36.54	4.39	17	2.12
西雄1号杨 P.×euramericana ‘Xixiong 1’	42.42	4.58	21	2.01
中雄7号杨 P.×euramericana ‘Zhongxiong 7’	47.40	4.50	22	2.14
中雄4号杨 P.deltoides×P.suaveolens cl. ‘Zhongxiong 4’	83.49	5.98	25	3.27

杨树品种 Poplar varietes	节间距 Section spacing/cm	叶片数量/枚 Number of blades
渤丰3号杨 P.×euramericana ‘Bofeng 3’	2.21±0.07b	24±0.71b
渤丰1号杨 P.×euramericana ‘Bofeng 1’	2.07±0.13d	22±0.71c
西雄1号杨 P.×euramericana ‘Xixiong 1’	2.14±0.06c	25±0.50b
中雄7号杨 P.×euramericana ‘Zhongxiong 7’	2.20±0.04b	25±0.82b
中雄4号杨 P. deltoides×P. suaveolens cl. ‘Zhongxiong 4’	3.16±0.01a	29±0.82a

杨树品种 Poplar varieties	叶长 Length of leaf/cm	叶宽 Leaf width/cm	单叶面积 Leaf area/cm²	总叶面积 Total blade area/cm²
渤丰3号杨 P.×euramericana ‘Bofeng 3’	6.94±0.03b	7.69±0.16b	35.35±0.33b	852.35±7.92c
渤丰1号杨 P.×euramericana ‘Bofeng 1’	6.17±0.13d	7.27±0.03c	28.97±0.67c	633.38±17.01d
西雄1号杨 P.×euramericana ‘Xixiong 1’	7.17±0.23b	7.96±0.17b	37.23±0.83b	932.75±6.50b
中雄7号杨 P.×euramericana ‘Zhongxiong 7’	6.46±0.28c	7.85±0.37b	35.74±0.94b	884.09±23.41bc
中雄4号杨 P.deltoides×P.suaveolens cl. ‘Zhongxiong 4’	8.91±0.15a	9.04±0.40a	57.49±2.37a	1721.10±28.59a

杨树品种 Poplar varietes	气孔导度G_s /（mmol·m^-2·s^-1）	胞间CO₂摩尔分数C_i /（μmol·mol^-1）	蒸腾速率T_r /（g·m^-2·h^-1）	SPAD值 SPAD value
渤丰3号杨 P.×euramericana ‘Bofeng 3’	0.249±0.037b	273.05±6.48a	4.62±0.12b	34.47±0.21b
渤丰1号杨 P.×euramericana ‘Bofeng 1’	0.274±0.015a	274.51±2.32a	5.14±0.16a	36.13±0.78a
西雄1号杨 P.×euramericana ‘Xixiong 1’	0.224±0.008c	262.27±2.32b	4.51±0.07c	31.61±0.14c
中雄7号杨 P.×euramericana ‘Zhongxiong 7’	0.215±0.003c	244.84±0.64c	3.67±0.03d	34.42±0.14b
中雄4号杨 P.deltoides×P.suaveolens cl. ‘Zhongxiong 4’	0.157±0.005d	232.99±5.61d	3.39±0.13e	30.31±0.22d

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[12]	LIU Zhao-Ying, JIANG Chuan-Ying, ZHAI Tong-Tong, CHANG Yuan, YAO Zhi-Hong, LIU Zhi-Hua, ZHANG Rong-Shu. Effects of Trichoderma asperellum Combined Application on Growth and Photosynthesis Characteristics of Populus davidiana×P.alba var. pyramidlis [J]. Bulletin of Botanical Research, 2018, 38(1): 64-74.
[13]	ZHANG Ming, LIU Fu-De, AN Shu-Qing, CAO Xue-Zhang. Leaf Traits of the Saplings of Later Successional Stage Tropical Montane Rain Forest in Hainan Island [J]. Bulletin of Botanical Research, 2017, 37(6): 907-914.
[14]	WANG Ke；DIAO Jian；YANG Rui；HU Yan-Bo；SUN Guang-Yu. Effects of Leaf-spraying Nitrate on Stomatal Dynamics and Photosynthesis of Syringa oblata* Lindl. Leaves [J]. Bulletin of Botanical Research, 2015, 35(6): 843-847.
[15]	ZHANG Qiang1,2；GUO Chuan-You1；ZHANG Xing-Wang1；BAI Kun-Dong2；JIANG De-Bing3. Photosynthesis and Antioxidant Defense Strategies in Overwintering Plants of Tsuga chinensis* and Cyclobalanopsis stewardiana [J]. Bulletin of Botanical Research, 2015, 35(2): 200-207.