Photosynthetic characteristics explain the high growth rate for Eucalyptus camaldulensis: Implications for breeding strategy
Yang, Ying-Jie1,3; Tong, You-Gui2; Yu, Guo-Yun2; Zhang, Shi-Bao1; Huan, Wei1
2018-11-15
发表期刊INDUSTRIAL CROPS AND PRODUCTS
ISSN0926-6690
卷号124页码:186-191
摘要Eucalypt wood is a valuable raw material for pulping worldwide. Because of its high growth rate, Eucalyptus camaldulensis has been introduced for plantation production in many tropical and subtropical areas in China. However, photosynthetic mechanisms underlying the rapid growth rate of E. camaldulensis are not well known. Furthermore, little is known about the relative photosynthetic limitations that complicate breeding strategies for this species. In the present study, we examined the photosynthetic characteristics for leaves of E camaldulensis and observed stomata on both adaxial and abaxial surfaces, with their density being higher on the latter. Regardless of which surface was exposed to sunlight, the actual whole-leaf photosynthesis of E. camaldulensis reached 42.00 mu mol CO2 m(-2) s(-1), which is much higher than that reported for other C3 plants. Although both surfaces showed high photosynthetic rates, photosynthesis and intrinsic water-use efficiency were always greater on the abaxial surface, mainly because of differences in mesophyll conductance (g(m)). Analysis of quantitative limitations revealed that g(m) was the most constraining factor for photosynthesis while stomatal conductance was much less important. Taken together, our results imply that g(m) is a potential target for simultaneous improvement of photosynthesis and photosynthetic water-use efficiency in E. camaldulensis, and we propose that increased gm is an important trait for breeding of that species.
关键词Eucalyptus camaldulensis Photosynthesis Mesophyll conductance Water-use efficiency Stomata
资助信息Youth Innovation Promotion Association of the Chinese Academy of Sciences; National Natural Science Foundation of China
语种英语
资助项目Youth Innovation Promotion Association of the Chinese Academy of Sciences[2016347] ; National Natural Science Foundation of China[31670343]
文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/63093
专题资源植物与生物技术所级重点实验室
通讯作者Huan, Wei
作者单位1.Chinese Acad Sci, Dept Econ Plants & Biotechnol, Kunming Inst Bot, Kunming 650201, Yunnan, Peoples R China
2.Forestry Bur Dongchuan Cty, Kunming 654100, Yunnan, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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Yang, Ying-Jie,Tong, You-Gui,Yu, Guo-Yun,et al. Photosynthetic characteristics explain the high growth rate for Eucalyptus camaldulensis: Implications for breeding strategy[J]. INDUSTRIAL CROPS AND PRODUCTS,2018,124:186-191.
APA Yang, Ying-Jie,Tong, You-Gui,Yu, Guo-Yun,Zhang, Shi-Bao,&Huan, Wei.(2018).Photosynthetic characteristics explain the high growth rate for Eucalyptus camaldulensis: Implications for breeding strategy.INDUSTRIAL CROPS AND PRODUCTS,124,186-191.
MLA Yang, Ying-Jie,et al."Photosynthetic characteristics explain the high growth rate for Eucalyptus camaldulensis: Implications for breeding strategy".INDUSTRIAL CROPS AND PRODUCTS 124(2018):186-191.
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