Water relations and gas exchange of tropical saplings during a prolonged drought in a Bornean heath forest, with reference to root architecture

Author:

Cao Kun-fang

Abstract

Leaf water and osmotic potentials and gas exchange were monitored during a prolonged El Niño drought in 1998 for saplings of seven species in a Bornean heath forest and compared with measurements taken during a subsequent wet period. The four dipterocarp species maintained reasonably good water status throughout the drought, especially Dipterocarpus borneensis which had thick and deep tap roots. In contrast, two of three non-dipterocarp species, Cleistanthus baramicus and Tristaniopsis obovata displayed predawn leaf water potentials approaching their turgor-loss points. During the drought, all species except D. borneensis displayed strongly reduced stomatal conductance after a brief exposure to sun, and all displayed lower maximum rates of stomatal conductance and net photosynthesis than during the wet period. Only Cotylelobium burckii displayed significant osmotic acclimation to the drought. T. obovata possessing a superficial root system suffered a high mortality due to the drought, but recovered faster after the first rains than the other species all of which had tap roots. Deep roots and strong stomatal control favour trees in tropical heath forests where water deficits probably occur regularly.

Publisher

Cambridge University Press (CUP)

Subject

Ecology, Evolution, Behavior and Systematics

Cited by 70 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Tropical root responses to global changes: A synthesis;Global Change Biology;2024-07

2. PtrABR1 Increases Tolerance to Drought Stress by Enhancing Lateral Root Formation in Populus trichocarpa;International Journal of Molecular Sciences;2023-09-06

3. Ecophysiological responses of seedlings of six dipterocarp species to short-term drought in Borneo;Frontiers in Forests and Global Change;2023-02-03

4. Plant diversity in Kapuas Hulu, West Borneo: Study case of Danau Sentarum National Park;PROCEEDINGS OF THE 9TH INTERNATIONAL SYMPOSIUM ON INNOVATIVE BIOPRODUCTION INDONESIA ON BIOTECHNOLOGY AND BIOENGINEERING 2022: Strengthening Bioeconomy through Applied Biotechnology, Bioengineering, and Biodiversity;2023

5. Topography in tropical forests enhances growth and survival differences within and among species via water availability and biotic interactions;Functional Ecology;2021-12-12

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3