五个杨树品种生长、光合生理及根尖离子流速特性比较分析

张婧, 张伟溪, 丁昌俊, 苑正赛, 代丽蕊, 苏晓华, 沈应柏, 曲冠证

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植物研究 ›› 2024, Vol. 44 ›› Issue (1) : 96-106. DOI: 10.7525/j.issn.1673-5102.2024.01.012
生理与生态

五个杨树品种生长、光合生理及根尖离子流速特性比较分析

  • 张婧1,2, 张伟溪2, 丁昌俊2(), 苑正赛1,2, 代丽蕊1,2, 苏晓华2, 沈应柏3, 曲冠证1
作者信息 +

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

  • Jing ZHANG1,2, Weixi ZHANG2, Changjun DING2(), Zhengsai YUAN1,2, Lirui DAI1,2, Xiaohua SU2, Yingbai SHEN3, Guanzheng QU1
Author information +
History +

摘要

通过比较不同品种杨树(Populus)的生长、光合生理及根尖离子流速特性差异,为速生适应性强品种的早期选育提供参考。以渤丰3号杨(P. × euramericana ‘Bofeng 3’)、渤丰1号杨(P. × euramericana ‘Bofeng 1’)、西雄1号杨(P. × euramericana ‘Xixiong 1’)、中雄7号杨(P. × euramericana ‘Zhongxiong 7’)和中雄4号杨(P. deltoides × P. suaveolens cl. ‘Zhongxiong 4’)5个杨树品种1年生苗为研究对象,于正常培养条件下的试验开始和试验结束(30 d)时分别测定株高、地径等生长指标,并于10、20、30 d时分别测定幼苗的叶片数量、单叶面积、叶长、叶宽、瞬时净光合速率(Pn)、胞间CO2摩尔浓度(Ci)、气孔导度(Gs)、蒸腾速率(Tr)、叶绿素相对含量以及根尖K+、Ca2+、H+流速等指标,经过30 d的正常管理,5个品种的株高生长量之间的差异达到显著水平,由高到低依次为中雄4号杨、西雄1号杨、渤丰3号杨、中雄7号杨、渤丰1号杨;其中光合特性指标和蒸腾速率渤丰1号杨均表现为最大,中雄4号杨均表现为最小,但是中雄4号杨的单叶面积((57.49±2.37) cm2)、总叶面积((1 721.10± 28.59) cm2)、单株净光合速率((17 863.10±910.21) μmol·m-2·s-1)和水分利用率((3.15±0.06) μmol·mmol-1)均表现为最大,且K+外排流速最慢,为(62.68±0.45) pmol·cm-2·g-1,Ca2+内流流速最快,为(-74.24±1.29) pmol·cm-2·g-1,而渤丰1号的单株净光合速率((8 539.70±164.64) μmol·m-2·s-1)和水分利用率((2.64±0.07) μmol·mmol-1)最小,且K+外排流速((130.81±1.71) pmol·cm-2·g-1)最快,Ca2+内流流速((-34.43±0.84) pmol·cm-2·g-1)最慢。综上所述,5个杨树品种中,中雄4号杨总叶面积、单株净光合速率、水分利用率最高,蒸腾速率最小,根尖K+外排流速最慢,Ca2+内流流速最快,植物体内K+、Ca2+离子含量最多,H+最活跃,株高生长表现最好,可能具有潜在的较强环境适应能力,适宜种植的范围更广。

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 PnCiGsTr, 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, Pnand WUE, the lowest Tr 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.

关键词

杨树品种 / 生长差异 / 光合作用 / 蒸腾作用 / 根尖离子流速

Key words

poplar varieties / growth difference / photosynthesis / transpiration / apical ion flow rate

中图分类号

S722.3+6

引用本文

导出引用
张婧, 张伟溪, 丁昌俊, 苑正赛, 代丽蕊, 苏晓华, 沈应柏, 曲冠证. 五个杨树品种生长、光合生理及根尖离子流速特性比较分析. 植物研究. 2024, 44(1): 96-106 https://doi.org/10.7525/j.issn.1673-5102.2024.01.012
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 https://doi.org/10.7525/j.issn.1673-5102.2024.01.012

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基金

国家“十四五”重点研发计划课题(2021YFD2201205);中央级公益性科研院所基本科研业务费专项资金项目(CAFYBB2020SZ002)

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