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首页> 外文期刊>Ecological research >Contrastive seasonal changes in ecophysiological traits of leaves of two perennial Polygonaceae herb species differing in leaf longevity and altitudinal distribution
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Contrastive seasonal changes in ecophysiological traits of leaves of two perennial Polygonaceae herb species differing in leaf longevity and altitudinal distribution

机译：两种多年生Poly科草本植物叶片的生理生态特征的季节性季节性变化，不同的是叶片寿命和海拔高度分布

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摘要

To identify the leaf characteristics associated with the difference in altitudinal distribution of Polygonaceae plants, we investigated the seasonal changes in leaf characteristics of co-occurring Aconogonum weyrichii and Reynoutria japonica at 2250 m a.s.l. on Mt. Fuji. Aconogonum weyrichii is distributed in the alpine region and R. japonica from the lowlands to the highlands. At the beginning of the growing period, leaves of A. weyrichii had larger amounts of nitrogen, Rubisco and higher photosynthetic capacity than R. japonica. The relationship between the amounts of nitrogen and Rubisco did not significantly differ between the species, but a higher Rubisco activity per unit Rubisco protein content was found in A. weyrichii, and was thought to be responsible for the high photosynthetic capacity of this species in summer. Activity of ascorbate peroxidase, a key enzyme of the hydrogen peroxide scavenging system against oxidative stress under chilling and light conditions, increased significantly in R. japonica late in the growing period, but did not significantly change in A. weyrichii. In A. weyrichii, rapid maturation of leaves and a high photosynthetic capacity are thought to be adaptive features for the short growing season in alpine regions. On the other hand, the slower accumulation of nitrogen and Rubisco during the early stage of the growing period in R. japonica resulted in insufficient utilization of the growing period for photosynthetic production and is thought to be one of the factors restricting the upper limit of its distribution.
机译：为了确定与何首乌植物的垂直分布差异相关的叶片特征，我们调查了2250 m a.s.l.的同时存在的乌头和日本刺柏的叶片特征的季节性变化。在山上富士乌头乌头菌分布在高山地区和日本粳稻，从低地到高地。在生长期开始时，与日本粳稻相比，美国牧草叶片的氮，Rubisco含量更高，光合能力更高。氮与Rubisco量之间的关系在两个物种之间没有显着差异，但是在A. weyrichii中发现了较高的Rubisco活性/单位，这被认为是夏季该物种高光合能力的原因。 。抗坏血酸过氧化物酶的活性是过氧化氢清除系统在寒冷和光照条件下抵抗氧化应激的关键酶，在生长期后期，粳稻中的抗坏血酸过氧化物酶活性显着增加，而魏氏假丝酵母则没有明显变化。在Weyrichii中，叶片的快速成熟和高的光合能力被认为是高山地区短生长季节的适应性特征。另一方面，粳稻生育期初期氮和Rubisco的积累较慢，导致生育期对光合生产的利用不足，被认为是限制其上限的因素之一。分配。

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