Comparative Evaluation of Physiological Response and Drought Tolerance between Cunninghamia unica and C. lanceolata Seedlings under Drought Stress

Author:

Lei Xun1,Wu Huaxue1,Yin Man1,Zhang Xi1,Yang Hanbo1ORCID,Huang Xiong1,Zhu Peng1

Affiliation:

1. Forestry Ecological Engineering in the Upper Reaches of the Yangtze River Key Laboratory of Sichuan Province, National Forestry and Grassland Administration Key Laboratory of Forest Resources Conservation and Ecological Safety on the Upper Reaches of the Yangtze River, Rainy Area of West China Plantation Ecosystem Permanent Scientific Research Base, Institute of Ecology & Forestry, Sichuan Agricultural University, Chengdu 611130, China

Abstract

Cunninghamia plays an important role in China’s southern forest industry in the face of increasingly arid climate; thus it is urgent to identify and screen drought-tolerant varieties. In this study, 2-year-old seedlings of C. unica and C. lanceolata from four provenances were subjected to water-break tests, and their physiological responses to different drought conditions were observed. The results showed that with the aggravation of drought stress, C. unica had more stable changes in relative water content (RWC), water potential (Ψw) and intercellular CO2 concentration (Ci) with more cumulative amounts of proline (PRO) than C. lanceolata, and its H2O2 maintained at a lower level, along with antioxidant enzyme activities decreasing later as compared with C. lanceolata. Moreover, comprehensive evaluation showed that C. unica had a higher drought tolerance than C. lanceolata as a whole, which could have been shaped by maintaining Ψw and opening stomata in its relative drought conditions. This work provides a theoretical basis for understanding the drought tolerance of C. unica and C. lanceolate individuals, so as to accelerate selective breeding in Chinese fir.

Funder

Breeding Research Project of Sichuan Province

Natural Science Foundation Project of Sichuan Province

Publisher

MDPI AG

Subject

Forestry

Reference61 articles.

1. Lemke, P., Ren, J., Alley, R.B., Allison, I., and Zhang, T. (2007). IPCC, 2007: Climate Change 2007: Synthesis Report. Contribution of Working Groups I, II and III to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change.

2. Improving growth and photosynthetic performance of drought stressed tomato by application of nano-organic fertilizer involves up-regulation of nitrogen, antioxidant and osmolyte metabolism;Ahanger;Ecotox. Environ. Safe.,2021

3. Drought impacts on tree phloem: From cell-level responses to ecological significance;Salmon;Tree Physiol.,2019

4. Water use strategies and drought intensity define the relative contributions of hydraulic failure and carbohydrate depletion during seedling mortality;Li;Plant Physiol. Biochem.,2020

5. Differences in the ecological resilience of planted and natural Pinus massoniana and Cunninghamia lanceolata forests in response to drought in subtropical China;Cao;Chin. J. Appl. Ecol.,2021

Cited by 2 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

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