New insights into a sensitive life stage: hydraulics of tree seedlings in their first growing season

IF 8.3 1区生物学 Q1 PLANT SCIENCES

New Phytologist Pub Date : 2024-11-05 DOI:10.1111/nph.20243

Barbara Beikircher, Magdalena Held, Adriano Losso, Stefan Mayr

引用次数: 0

Abstract

Abstract Image

查看原文本刊更多论文

对敏感生命阶段的新认识：树苗第一个生长季节的水力学。

树木生命的第一年具有明显的形态变化特征，需要不断调整水力系统。尽管树苗对森林的自然再生和未来植被的构成非常重要，但人们对树苗的水力学知之甚少。在第一个生长季节的不同时期，我们分析了三种温带针叶树、两种被子植物乔木和一种被子植物灌木木质部特定区域（Kshoot_Axyl）和叶片特定区域（Kshoot_L）的嫩枝水导以及抗栓塞性，并将分析结果与细胞渗透参数和木质部解剖特征联系起来。在发芽后的头 10 周，Kshoot_Axyl 和 Kshoot_L 急剧下降，然后保持稳定，直到生长季节结束。最幼嫩阶段的抗栓塞性明显较低，但随着细胞壁加固程度的提高，抗栓塞性在秋季显著提高。与此同时，失去张力时的水势和饱和时的渗透势下降。与品系、物种和生长形式无关，从初级木质部到次级木质部的过渡导致了一个效率较低但抗栓塞性越来越强的水力系统，从而在低水势风险不断增加的情况下实现了稳定的供水。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

New Phytologist 生物-植物科学

自引率

5.30%

发文量

728

期刊介绍： New Phytologist is an international electronic journal published 24 times a year. It is owned by the New Phytologist Foundation, a non-profit-making charitable organization dedicated to promoting plant science. The journal publishes excellent, novel, rigorous, and timely research and scholarship in plant science and its applications. The articles cover topics in five sections: Physiology & Development, Environment, Interaction, Evolution, and Transformative Plant Biotechnology. These sections encompass intracellular processes, global environmental change, and encourage cross-disciplinary approaches. The journal recognizes the use of techniques from molecular and cell biology, functional genomics, modeling, and system-based approaches in plant science. Abstracting and Indexing Information for New Phytologist includes Academic Search, AgBiotech News & Information, Agroforestry Abstracts, Biochemistry & Biophysics Citation Index, Botanical Pesticides, CAB Abstracts®, Environment Index, Global Health, and Plant Breeding Abstracts, and others.