3个沙棘品种叶片形态与光合特性比较
Comparison of leaf morphology and photosynthetic characteristics of three Hippophae rhamnoides strains
邓子易 1岳丽华 1刘春海 1蔺鑫 1陈海鹏 1李玉灵1
作者信息
- 1. 河北农业大学林学院,河北保定 071000
- 折叠
摘要
为揭示"北欧1号""宇璐""深秋红"3个沙棘品种光合特性的差异,探究不同沙棘品种成熟叶片形态特征对其净光合速率的影响,分别测定了叶片形态特征及其光合生理指标,并进行相关性分析.结果表明:(1)"宇璐"叶面积最大,"深秋红"叶面积最小,但3个品种叶片形态及各项指标差异均不显著;(2)"北欧1号"的净光合速率(Pn)、蒸腾速率(Tr)、胞间CO2浓度(Ci)、气孔导度(Gs)均显著大于其他2个品种,水分利用效率和气孔限制值均显著小于其他2个品种;(3)逐步回归分析表明蒸腾速率、胞间CO2浓度为3个品种净光合速率的主要影响因子,"北欧1号""深秋红"的净光合速率降低是受气孔导度的影响,而"宇璐"净光合速率降低则是非气孔限制导致.综上说明"北欧1号"通过消耗更多水分维持较高的光合生产能力,"深秋红"通过更高的水分利用率,维持光合生产能力,但"宇璐"与"深秋红"光合速率等指标无显著差异、光合能力相近,说明"宇璐"通过较大的叶面积来保障其光合生产能力.
Abstract
To reveal the differences in photosynthetic characteristics of three Hippophae rh-amnoides strains,and explore the effects of mature leaf morphology and other factors on their net photosynthetic rate,this study measured the leaf morphology index and photosyn-thetic physiological indicators of three H.rhamnoides strains,namely"Nordic No.1","Yulu",and"Shenqiuhong",and analyzed the influencing factors of net photosynthetic rate.The results showed that:(1)"Yulu"had the largest leaf area and"Shenqiuhong"had the smallest leaf area,but the differences in leaf morphology and various indicators among the three varieties were not significant;(2)Netphotosynthetic rate(Pn),transpiration rate(Tr),intercellular carbon dioxide concentration(Ci),and stomatal conductance(Gs)of"Nordic No.1"were significantly higher than the other two varieties,and the water use efficiency and stomatal limitation values were significantly lower than the other two varieties;(3)Multiple stepwise regression analysis showed that physiological factors transpiration rate and intercel-lular carbon dioxide concentration were the main influencing factors of netphotosynthetic rate in the three varieties.The decrease in netphotosynthetic rate in"Nordic No.1"and"Shenqiuhong"was influenced by stomatal conductance,while the decrease in netphotosyn-thetic rate in"Yulu"was caused by non stomatal limitation.In summary,"Nordic No.1"maintains a higher photosynthetic production capacity by consuming more water;"Shenqi-uhong"maintained photosynthetic production capacity through higher water use efficiency.However,there was no significant difference in photosynthetic rate and other indicators be-tween"Yulu"and"Shenqiuhong",and the photosynthetic capacity was similar,indicating that"Yulu"guaranteed its photosynthetic production capacity through a larger leaf area.
关键词
沙棘/叶形态特征/光合特性/日变化Key words
Hippophae rhamnoides/morphological characteristics/photosynthetic character-istic/diurnal change引用本文复制引用
基金项目
承德国家可持续发展议程创新示范区建设科技专项(202206F012)
出版年
2024
国家科技期刊平台
NSTL
万方数据