Changes in leaf physiology for eucalyptus genotypes with increase in integral water stress and its consequence for initial growth in central Chile

IF 0.5 4区 农林科学 Q4 FORESTRY Scientia Forestalis Pub Date : 2022-07-20 DOI:10.18671/scifor.v50.09
Thiago Wendling Gonçalves de Oliveira, R. Rubilar, C. Sanquetta, A. Corte, Daniel Bozo, A. Medina, O. Mardones, Verónica Emhart, Juan Jose Quiroga, Hector E. Valenzuela
{"title":"Changes in leaf physiology for eucalyptus genotypes with increase in integral water stress and its consequence for initial growth in central Chile","authors":"Thiago Wendling Gonçalves de Oliveira, R. Rubilar, C. Sanquetta, A. Corte, Daniel Bozo, A. Medina, O. Mardones, Verónica Emhart, Juan Jose Quiroga, Hector E. Valenzuela","doi":"10.18671/scifor.v50.09","DOIUrl":null,"url":null,"abstract":"Limited information exists on how small changes in soil water affect the physiological responses of eucalyptus and their relationship with productivity. This experiment evaluated physiological traits during decreased soil water and compared them with growth and water stress integral (WSI) of 22 eucalyptus genotypes with 1.5 years old. The experiment was conducted in sandy soil with low water holding capacity in Chile. Selected genotypes were Eucalyptus globulus, E. nitens, and E. nitens × E. globulus hybrids (E. gloni). Seasonal predawn leaf water potential (Ψpd) was evaluated under well-irrigated conditions and after 40 days without irrigation. Subsequently, two sampling instances were considered for analysis, wellirrigated conditions M0 (470 days after planting) and 40 days without irrigation Mfinal (510 days after planting). During that period, we measured midday leaf water potential (Ψmd), leaf area index (LAI), diurnal changes in photosynthesis (An) and stomatal conductance (gs). The broad range of WSI among genotypes indicated contrasting levels of accumulated water stress during early development. In fact, E. globulus presented 30% more water stress than E. nitens, and genotypes with the highest WSI showed the lowest growth. Between M0 and Mfinal, there was a reduction in An and gs in the morning and midday with small changes in the afternoon, and consequently, values of the intrinsic water use efficiency (iWUE) increased. The Ψmd showed small changes and we observed a large LAI increment for all genotypes. Changes in iWUE were more pronounced for genotypes with lower WSI, which suggested that these genotypes with lower accumulated water stress were more sensitive to changes in soil water, such as E. gloni genotypes allowing them to maintain high productivity.","PeriodicalId":54443,"journal":{"name":"Scientia Forestalis","volume":null,"pages":null},"PeriodicalIF":0.5000,"publicationDate":"2022-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Scientia Forestalis","FirstCategoryId":"97","ListUrlMain":"https://doi.org/10.18671/scifor.v50.09","RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"FORESTRY","Score":null,"Total":0}
引用次数: 0

Abstract

Limited information exists on how small changes in soil water affect the physiological responses of eucalyptus and their relationship with productivity. This experiment evaluated physiological traits during decreased soil water and compared them with growth and water stress integral (WSI) of 22 eucalyptus genotypes with 1.5 years old. The experiment was conducted in sandy soil with low water holding capacity in Chile. Selected genotypes were Eucalyptus globulus, E. nitens, and E. nitens × E. globulus hybrids (E. gloni). Seasonal predawn leaf water potential (Ψpd) was evaluated under well-irrigated conditions and after 40 days without irrigation. Subsequently, two sampling instances were considered for analysis, wellirrigated conditions M0 (470 days after planting) and 40 days without irrigation Mfinal (510 days after planting). During that period, we measured midday leaf water potential (Ψmd), leaf area index (LAI), diurnal changes in photosynthesis (An) and stomatal conductance (gs). The broad range of WSI among genotypes indicated contrasting levels of accumulated water stress during early development. In fact, E. globulus presented 30% more water stress than E. nitens, and genotypes with the highest WSI showed the lowest growth. Between M0 and Mfinal, there was a reduction in An and gs in the morning and midday with small changes in the afternoon, and consequently, values of the intrinsic water use efficiency (iWUE) increased. The Ψmd showed small changes and we observed a large LAI increment for all genotypes. Changes in iWUE were more pronounced for genotypes with lower WSI, which suggested that these genotypes with lower accumulated water stress were more sensitive to changes in soil water, such as E. gloni genotypes allowing them to maintain high productivity.
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
智利中部桉树基因型叶片生理变化与整体水分胁迫的增加及其对初始生长的影响
关于土壤水分的微小变化如何影响桉树的生理反应及其与生产力的关系的信息有限。本试验评价了土壤水分减少时的生理性状,并与22个1.5年生桉树基因型的生长和水分胁迫积分(WSI)进行了比较。试验在智利低持水能力的沙质土壤中进行。选择的基因型为蓝桉、蓝桉和蓝桉×蓝桉杂交(绿桉)。在良好灌溉条件下和不灌溉40 d后评估季节黎明前叶片水势(Ψpd)。随后,考虑两个采样实例进行分析,即灌溉条件M0(种植后470天)和不灌溉40天Mfinal(种植后510天)。在此期间,我们测量了正午叶片水势(Ψmd)、叶面积指数(LAI)、光合作用(An)和气孔导度(gs)的日变化。不同基因型间WSI的广泛差异表明在发育早期积累水分胁迫的不同水平。事实上,黄颡鱼的水分胁迫比黄颡鱼高30%,且WSI最高的基因型生长最低。在M0和Mfinal之间,上午和中午的An和gs减少,下午变化较小,因此内在水分利用效率(iWUE)值增加。Ψmd的变化很小,我们观察到所有基因型的LAI都有很大的增加。WSI较低的基因型的iWUE变化更为明显,这表明积累水分胁迫较低的基因型对土壤水分变化更为敏感,如E. gloni基因型,使其能够保持较高的生产力。
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 去求助
来源期刊
Scientia Forestalis
Scientia Forestalis Agricultural and Biological Sciences-Forestry
CiteScore
1.00
自引率
0.00%
发文量
39
期刊介绍: Scientia Forestalis is a scientific publication of the IPEF – Institute of Forest Research and Studies, founded in 1968, as a nonprofit institution, in agreement with the LCF – Department of Forest Sciences of the ESALQ – Luiz de Queiroz College of Agriculture of the USP – São Paulo University. Scientia Forestalis, affiliated to the ABEC – Brazilian Association of Scientific Publishers, publishes four issues per year of original papers related to the several fields of the Forest Sciences. The Editorial Board is composed by the Editor, the Scientific Editors (evaluating the manuscript), and the Associated Editors (helping on the decision of acceptation or not of the manuscript, analyzed by the Peer-Reviewers.
期刊最新文献
Caracterização e modelagem biométrica de Dicksonia sellowiana Hook. em floresta ombrófila mista alto-montana Litter decomposition in Eucalyptus saligna Smith plantation in Pampa biome in southern of Brazil Qualidade de mudas de paricá [Schizolobium parahyba var. amazonicum (Huber ex Ducke) Barneby] em função de níveis de sombreamento e doses de húmus adicionadas ao substrato Wood properties of 32-year-old Peltophorum dubium wood from two seed provenances planted in Luiz Antônio - SP, Brazil Efeito de diferentes espaçamentos de plantio de Tachigali vulgaris L.G.Silva & H.C.Lima na fertilidade do solo
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1