Effects of artificial simulation of rainfall patterns on growth, Non-structural carbohydrates, and ecostoichiometric characteristics of Cyphomandra betacea seedlings

Author:

Li xingze1,Sun Lijuan1,guo huanxian1,Cha Xiaofei1,Zheng Shaojie1,Zeng Huiping1,Dong Qiong1

Affiliation:

1. Southwest Forestry University

Abstract

Abstract

Global climate change is increasing the frequency of extreme weather events and disrupting rainfall patterns, with far-reaching consequences for ecosystems. Plant growth and development processes are extremely sensitive to water conditions, so understanding the effects of rainfall variability on seedlings is critical. However, it is unclear how Cyphomandra betacea seedlings respond to changes in rainfall. This study investigated the response of Cyphomandra betacea seedling biomass, nutrient accumulation, and non-structural carbohydrates (NSC) content to different rainfall intervals and amounts. Using two rainfall intervals, T (3 day) and T+ (6 day), and three rainfall events, average monthly rainfall was used as a control (W), with a corresponding 40% increase in rainfall (W+) and 40% decrease in rainfall (W-) as rainfall treatments. The result showed that increasing rainfall under both rainfall intervals significantly promoted (P < 0.05) the growth of seedling height and soil diameter. The accumulation of root and stem biomass was reduced under the T+ rainfall interval. There was a correlation between the contents of NSC and C, N, and P and their stoichiometric characteristics in seedlings, Changes in N content among organs were crucial for NSC and its fractions and constrained the interconversion of soluble sugar (SS) and starch (ST). At T intervals, more rainfall favored N partitioning into stems and P partitioning into leaves; at T+ rainfall intervals, C and N partitioning into leaves was favored; and more rainfall significantly increased C, N, and P contents in all organs (P < 0.05), but decreased C:N and C:P in all organs of seedlings. In conclusion, the simulated July W+T treatment was effective in improving seedling growth and promoting the accumulation of non-structural carbon and C, N, and P contents in various organs.

Publisher

Springer Science and Business Media LLC

Reference70 articles.

1. Leaf dynamics, self shading and carbon gain in seedlings of a tropical pioneer tree[J];Ackerly DD;Oecologia,1995

2. Stoichiometry and nutrition of plant growth in natural communities;Agren G;Annu Rev Ecol Evol Syst,2008

3. Staged strategy of plants in response to drought stress [J];An YY;Chin J Appl Ecol,2012

4. Soil and plant nutrient status of protective forests in western bank of Dongting Lake;Bai FM;Acta Ecol. Sin.,2010

5. Effects of N addition on ecological stoichiometric characteristics in six dominant plant species of alpine meadow on the Qinghai Xizang Plateau, China [J];Bin ZJ;Chin J Plant Ecol,2014

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