Advanced   Register
XTBG OpenIR  > 其他  > 期刊论文

title: The Sclerophyllous Eucalyptus camaldulensis and Herbaceous Nicotiana tabacum Have Different Mechanisms to Maintain High Rates of Photosynthesis
author: Huang, Wei;  Tong, You-Gui;  Yu, Guo-Yun
Issued Date: 2016
Abstract: It is believed that high levels of mesophyll conductance (gm) largely contribute to the high rates of photosynthesis in herbaceous C-3 plants. However, some sclerophyllous 03 plants that display low levels of gm have high rates of photosynthesis, and the underlying mechanisms responsible for high photosynthetic rates in sclerophyllous 03 plants are unclear. In the present study, we examined photosynthetic characteristics in two high-photosynthesis plants (the sclerophyllous Eucalyptus camaldulensis and the herbaceous Nicotiana tabacum) using measurements of gas exchange and chlorophyll fluorescence. Under saturating light intensities, both species had similar rates of 002 assimilation at 400 mu mol mol(-1) CO2 (A(400)). However, E. camaldulensis exhibited significantly lower g(m) and chloroplast CO2 concentration (C-C) than N. tabacum. A quantitative analysis revealed that, in E. camaldulensis, the g(m) limitation was the most constraining factor for photosynthesis. By comparison, in N. tabacum, the biochemical limitation was the strongest, followed by g(m) and g(S) limitations. In conjunction with a lower C-C, E. camaldulensis up-regulated the capacities of photorespiratory pathway and alternative electron flow. Furthermore, the rate of alternative electron flow was positively correlated with the rates of photorespiration and ATP supply from other flexible mechanisms, suggesting the important roles of photorespiratory pathway, and alternative electron flow in sustaining high rate of photosynthesis in E. camaldulensis. These results highlight the different mechanisms used to maintain high rates of photosynthesis in the sclerophyllous E. camaldulensis and the herbaceous N. tabacum.
Appears in Collections:其他_期刊论文

Files in This Item:

File SizeFormat
The Sclerophyllous Eucalyptus camaldulensis and Herbaceous Nicotiana tabacum Have Different Mechanisms to Maintain High Rates of Photosynthesis .pdf2307KbAdobe PDFView  Download

全文许可: Creative Commons 署名-非商业性使用-相同方式共享 3.0

Recommended Citation:
Huang, Wei,Tong, You-Gui,Yu, Guo-Yun. The Sclerophyllous Eucalyptus Camaldulensis And Herbaceous Nicotiana Tabacum Have Different Mechanisms To Maintain High Rates Of Photosynthesis[J]. Frontiers In Plant Science,2016,7(1769).

SCI Citaion Data:
 Recommend this item
 Sava as my favorate item
 Show this item's statistics
 Export Endnote File
Google Scholar
 Similar articles in Google Scholar
 [Huang, Wei]'s Articles
 [Tong, You-Gui]'s Articles
 [Yu, Guo-Yun]'s Articles
CSDL cross search
 Similar articles in CSDL Cross Search
 [Huang, Wei]‘s Articles
 [Tong, You-Gui]‘s Articles
 [Yu, Guo-Yun]‘s Articles
Scirus search
 Similar articles in Scirus
Related Copyright Policies
Social Bookmarking
  Add to CiteULike  Add to Connotea  Add to  Add to Digg  Add to Reddit 
所有评论 (0)
内 容:
Email:  *
验证码:   刷新
标 题:
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.



Valid XHTML 1.0!
Powered by CSpace