Effects of drought stress on the physiology, photosynthesis, and anatomical structure of container and bareroot plants of two Camellia oleifera cultivars

Author:

Shu Han-Yu1,Liu Yan-Yao1,Zhang Xiao-Yan1,Tan Xiao-Feng1,Li Ze1

Affiliation:

1. Central South University of Forestry and Technology

Abstract

Abstract

Background Oil-tea tree (Camellia oleifera Abel) is an important high-quality edible oil tree species in China and is also a pioneer afforestation tree species in hilly red soil areas in southern China. It can grow and bear fruit on relatively barren mountains. Although C. oleifera has strong adaptability, long-term drought still affects its normal growth and even causes plant death, which has a serious impact on the afforestation industry. Results Under drought stress, the leaf edge of the C. oleifera curled, and the leaf yellowed, drooped, and even withered and died. Moreover, the accumulation of catalase (CAT), soluble sugar (SS) and abscisic acid (ABA) gradually increased, and the CAT activity and SS content increased more in the bareroot-stage seedlings than in the container-stage seedlings. We observed that, compared with the CK treatment, the drought treatment (10 DAT) significantly reduced the net photosynthetic rate (Pn), transpiration rate (E), maximum photochemical efficiency (Fv/Fm), and actual photochemical and quantum efficiency (FPSII). The Pn in the ‘HS-CS’, ‘HS-BS’, ‘HJ-CS’ and ‘HJ-BS’ treatments decreased by 126.68%, 112.33%, 126.08% and 117.22%. We also found that the drought resistance of bareroot-stage plants was greater than that of container-stage plants. After rewatering under drought stress, multiple indices of C. oleifera were greater than normal, and physiological characteristics and anatomical structure were positively related to compensation or overcompensation. At the same time, we also found that the recovery ability of C. oleifera ‘Huashuo’ was greater than ' C. oleifera ‘Huajin’. Conclusion The results showed that drought led to yellowing and shrinkage of C. oleifera leaves, reduces photosynthetic efficiency, and ultimately affected the normal growth of C. oleifera materials. In order to prevent this situation, C. oleiferashould reduce drought stress or timely rehydration to maintain the stability of leaf structure, morphology and function. In addition, we found that the drought resistance of bareroot seedlings was greater than that of container seedlings, and the recovery ability of C. oleifera ‘Huashuo’ was stronger than that of C. oleifera ‘Huajin’.

Publisher

Research Square Platform LLC

Reference52 articles.

1. Jiang Guiqin. Study on Driving Mechanism and Assessment Methods of Drought [D]. China Institute of Water Resources & Hydropower Research; 2013.

2. Consequences of widespread tree mortality triggered by drought and temperature stress[J];Anderegg WRL;Nat Clim change,2013

3. Climate change. 2013: the physical science basis: Working Group I contribution to the Fifth assessment report of the Intergovernmental Panel on Climate Change[M]. Cambridge university press, 2014. http://doi.org/10.1017/CBO9781107415324.

4. Risk characteristics and control technology measures of drought disaster in Southern China[J];Zhang Qiang Y;Acta Ecol Sin,2017

5. Transcriptomic Responses of Potato to Drought Stress[J];Aliche EB;Potato Res,2021

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