NDLI: Mesophyll conductance in leaves of Japanese white birch (Betula platyphylla var. japonica) seedlings grown under elevated $CO_{2}$ concentration and low N availability

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Mesophyll conductance in leaves of Japanese white birch (Betula platyphylla var. japonica) seedlings grown under elevated $CO_{2}$ concentration and low N availability

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Mesophyll conductance in leaves of Japanese white birch (Betula platyphylla var. japonica) seedlings grown under elevated $CO_{2}$ concentration and low N availability

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Kitao, Mitsutoshi Yazaki, Kenichi Kitaoka, Satoshi Fukatsu, Eitaro Tobita, Hiroyuki Komatsu, Masabumi Maruyama, Yutaka Koike, Takayoshi
Description	Country affiliation: Japan Author Affiliation: Kitao M ( Department of Plant Ecology, Forestry and Forest Products Research Institute, Tsukuba 305-8687, Japan.); Yazaki K ( Hokkaido Research Center, Forestry and Forest Products Research Institute, Sapporo 062-8516, Japan.); Kitaoka S ( Department of Plant Ecology, Forestry and Forest Products Research Institute, Tsukuba 305-8687, Japan.); Fukatsu E ( Department of Plant Ecology, Forestry and Forest Products Research Institute, Tsukuba 305-8687, Japan.); Tobita H ( Kyushu Regional Breeding Office, Forest Tree Breeding Center, Forestry and Forest Products Research Institute, Koshi 861-1102, Japan.); Komatsu M ( Department of Plant Ecology, Forestry and Forest Products Research Institute, Tsukuba 305-8687, Japan.); Maruyama Y ( Hokkaido Research Center, Forestry and Forest Products Research Institute, Sapporo 062-8516, Japan.); Koike T ( Department of Plant Ecology, Forestry and Forest Products Research Institute, Tsukuba 305-8687, Japan.)
Abstract	To test the hypothesis that mesophyll conductance $(g_{m})$ would be reduced by leaf starch accumulation in plants grown under elevated $CO_{2}$ concentration $[CO_{2}],$ we investigated $g_{m}$ in seedlings of Japanese white birch grown under ambient and elevated $[CO_{2}]$ with an adequate and limited nitrogen supply using simultaneous gas exchange and chlorophyll fluorescence measurements. Both elevated $[CO_{2}]$ and limited nitrogen supply decreased area-based leaf N accompanied with a decrease in the maximum rate of Rubisco carboxylation $(V_{c,max})$ on a $CO_{2}$ concentration at chloroplast stroma $(C_{c})$ basis. Conversely, only seedlings grown at elevated $[CO_{2}]$ under limited nitrogen supply had significantly higher leaf starch content with significantly lower $g_{m}$ among the treatment combinations. Based on a leaf anatomical analysis using microscopic photographs, however, there were no significant difference in the area of chloroplast surfaces facing intercellular space per unit leaf area among treatment combinations. Thicker cell walls were suggested in plants grown under limited N by increases in leaf mass per area subtracting non-structural carbohydrates. These results suggest that starch accumulation and/or thicker cell walls in the leaves grown at elevated $[CO_{2}]$ under limited N supply might hinder $CO_{2}$ diffusion in chloroplasts and cell walls, which would be an additional cause of photosynthetic downregulation as well as a reduction in Rubisco activity related to the reduced leaf N under elevated $[CO_{2}].$
File Format	HTM / HTML
ISSN	00319317
Issue Number	4
Volume Number	155
e-ISSN	13993054
Journal	Physiologia Plantarum
Language	English
Publisher	Wiley
Publisher Date	2015-12-01
Publisher Place	Denmark
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Botany Betula Physiology Carbon Dioxide Metabolism Nitrogen Plant Leaves Seedling Algorithms Analysis Of Variance Growth & Development Carbohydrates Analysis Chlorophyll Fluorescence Kinetics Photosynthesis Cytology Ribulose-bisphosphate Carboxylase Starch Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Cell Biology Genetics Physiology Plant Science Medicine

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Low moisture availability inhibits the enhancing effect of increased soil temperature on net photosynthesis of white birch (Betula papyrifera) seedlings grown under ambient and elevated carbon dioxide concentrations

Photosynthetic downregulation in leaves of the Japanese white birch grown under elevated $CO_{2}$ concentration does not change their temperature-dependent susceptibility to photoinhibition

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Mesophyll conductance in leaves of Japanese white birch (Betula platyphylla var. japonica) seedlings grown under elevated $CO_{2}$ concentration and low N availability

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