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ID 23529
本文ファイル
著者
Kanai, Shunsuke
Adu-Gymfi, Joeseph
Lei, Kei
Ito, Junki
Ohkura, Katsumi
Moghaieb, Reda E. A.
El-Shemy, Hany
Mohapatra, Rashmi
Mohapatra, Pravat K.
Fujita, Kounosuke
キーワード
nitrogen
source-sink relationship
stem and fruit diameter
tomato
micro-morphometry
NDC
植物学
抄録(英)
Tomato (Lycopersicon esculentum) plants were grown in hydroponics. At the fruiting stage, N was withdrawn from the growing medium for a period of 19 days and its effects were studied on plant biomass production, photosynthesis, partitioning of 13C and 15N, and changes in the stem and fruit diameters, etc., in order to monitor the mechanism of resource management on the plant parts at low N and prevent excess use of the fertilizer. N-deficiency treatment decreased leaf photosynthesis immediately and affected biomass accumulation of tomato. Conversely, N-deficiency increased stem diameter for a period of two weeks before reducing it below the control. During this period, these results suggest that N deficiency suppresses the source activity more than the sink activity. N-deficiency reduced the amplitude of the circadian pattern of daytime shrinkage and nocturnal expansion of the stem diameter by decreasing the magnitude of the former. Circadian pattern of contraction and expansion of diameter was less evident in the fruit. Under N-deficiency, distribution of 13C and 15N decreased and increased, respectively in fruits. Restricted partitioning of carbon to fruits could be responsible for accumulation of unused assimilates and consequential osmotic adjustment for maintenance of stem water potential. This effect might have precluded contraction of stem diameter of N-deficient plants until the production of assimilates became limiting on account of depression of leaf photosynthesis.
内容記述
This version have some slight differences in wordings from the published version.
掲載誌名
Plant Science
174巻
2号
開始ページ
183
終了ページ
191
出版年月日
2008-02
出版者
Elsevier Ireland Ltd.
ISSN
0168-9452
NCID
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
author
権利情報
Copyright (c) 2007 Elsevier Ireland Ltd.
関連情報URL(IsVersionOf)
http://dx.doi.org/10.1016/j.plantsci.2007.11.006
部局名
生物圏科学研究科