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两管:从13C含量和叶面特定的表皮沉积推断出胃口的图案
Balzhan Askanbayeva1, Jitka Janová1, Jiří Kubásek1
1Department of Experimental Plant Biology, Faculty of Science, University of South Bohemia, Branišovská 31, 370 05 České Budějovice, Czech Republic.
Annals of botany
|June 5, 2024
概括
两体 (AS) 和两体 (HS) 叶子策略影响二氧化碳的吸收. 暴露在阳光下的叶子中增加的AS减少了叶子的CO2梯度,胃和沉积模式对齐.
科学领域:
- 植物生理学 植物生理学
- 植物解剖学 植物解剖学
- 同位素生态学 同位素生态学
背景情况:
- 了解两管 (AS) 与两管 (HS) 叶结构的好处和成本至关重要.
- AS涉及两个叶面上的胃口,而HS主要在下面 (斜轴) 表面的胃口.
- 叶子内部的二氧化碳度受到口腔分布和表皮沉积的影响.
研究的目的:
- 量化二氧化碳通过两体 (AS) 种的上层 (无轴) 叶面进入的好处.
- 为了研究口腔分布和在相反的叶片侧面的表皮状沉积之间的关系.
- 为了利用表皮中的13C丰度作为叶子内部二氧化碳度的代理.
主要方法:
- 在表皮中测量了13C的丰富度,以推断表皮的向和向二氧化碳度.
- 计算了同位素极性 (13C的差异在轴和轴表面之间),以确定叶子的背面腹部CO2梯度.
- 两体水平 (ASL) 和两体水平被量化,并与同位素极性和光线条件相关.
主要成果:
- 在所有光照条件下,静止体 (HS) 种类的表皮二氧化碳度在亚轴上低于亚轴上.
- 在AS物种中,二氧化碳梯度随着ASL变化而变化,随着ASL增加而下降,特别是在高光条件下.
- 暴露在阳光下的叶子中增加的ASL导致接近零的同位素极性,表明减少了CO2梯度.
结论:
- 叶同位素极性是一种新的特征,区分AS和HS物种.
- 暴露在阳光下的叶子中增加的ASL有效地降低了叶子中二氧化碳梯度.
- 门口分布和表皮沉积表现出协调的,叶面特定的图案.
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