Arid
DOI10.1093/jxb/eru022
Leaf anatomical traits which accommodate the facultative engagement of crassulacean acid metabolism in tropical trees of the genus Clusia
Zambrano, V. Andrea Barrera1; Lawson, Tracy2; Olmos, Enrique3; Fernandez-Garcia, Nieves3; Borland, Anne M.1,4
通讯作者Borland, Anne M.
来源期刊JOURNAL OF EXPERIMENTAL BOTANY
ISSN0022-0957
EISSN1460-2431
出版年2014
卷号65期号:13页码:3513-3523
英文摘要

Succulence and leaf thickness are important anatomical traits in CAM plants, resulting from the presence of large vacuoles to store organic acids accumulated overnight. A higher degree of succulence can result in a reduction in intercellular air space which constrains internal conductance to CO2. Thus, succulence presents a trade-off between the optimal anatomy for CAM and the internal structure ideal for direct C-3 photosynthesis. This study examined how plasticity for the reversible engagement of CAM in the genus Clusia could be accommodated by leaf anatomical traits that could facilitate high nocturnal PEPC activity without compromising the direct day-time uptake of CO2 via Rubisco. Nine species of Clusia ranging from constitutive C-3 through C-3/CAM intermediates to constitutive CAM were compared in terms of leaf gas exchange, succulence, specific leaf area, and a range of leaf anatomical traits (% intercellular air space (IAS), length of mesophyll surface exposed to IAS per unit area, cell size, stomatal density/size). Relative abundances of PEPC and Rubisco proteins in different leaf tissues of a C-3 and a CAM-performing species of Clusia were determined using immunogold labelling. The results indicate that the relatively well-aerated spongy mesophyll of Clusia helps to optimize direct C-3-mediated CO2 fixation, whilst enlarged palisade cells accommodate the potential for C-4 carboxylation and nocturnal storage of organic acids. The findings provide insight on the optimal leaf anatomy that could accommodate the bioengineering of inducible CAM into C-3 crops as a means of improving water use efficiency without incurring detrimental consequences for direct C-3-mediated photosynthesis.


英文关键词CAM Clusia leaf anatomy PEPC photosynthesis stomata
类型Article
语种英语
国家England ; Spain ; USA
收录类别SCI-E
WOS记录号WOS:000339953400017
WOS关键词STOMATAL APERTURE ; DESERT SUCCULENTS ; DELTA-C-13 VALUES ; CAM EXPRESSION ; CELL-SIZE ; PHOTOSYNTHESIS ; PLANTS ; CO2 ; ECOPHYSIOLOGY ; CONDUCTANCE
WOS类目Plant Sciences
WOS研究方向Plant Sciences
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/183287
作者单位1.Newcastle Univ, Sch Biol, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England;
2.Univ Essex, Sch Biol Sci, Colchester CO4 3SQ, Essex, England;
3.CEBAS CSIC Campus Univ Espinardo, Dept Abiot Stress & Plant Pathol, Murcia 30100, Spain;
4.Oak Ridge Natl Lab, Biosci Div, Oak Ridge, TN 37831 USA
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GB/T 7714
Zambrano, V. Andrea Barrera,Lawson, Tracy,Olmos, Enrique,et al. Leaf anatomical traits which accommodate the facultative engagement of crassulacean acid metabolism in tropical trees of the genus Clusia[J],2014,65(13):3513-3523.
APA Zambrano, V. Andrea Barrera,Lawson, Tracy,Olmos, Enrique,Fernandez-Garcia, Nieves,&Borland, Anne M..(2014).Leaf anatomical traits which accommodate the facultative engagement of crassulacean acid metabolism in tropical trees of the genus Clusia.JOURNAL OF EXPERIMENTAL BOTANY,65(13),3513-3523.
MLA Zambrano, V. Andrea Barrera,et al."Leaf anatomical traits which accommodate the facultative engagement of crassulacean acid metabolism in tropical trees of the genus Clusia".JOURNAL OF EXPERIMENTAL BOTANY 65.13(2014):3513-3523.
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