Assimilates Distribution in Young Peach Plants during Water Stress and afterRemoving Water Stress

ACTA HORTICULTURAE SINICA ›› 2004, Vol. 31 ›› Issue (5): 574-578.

• 研究论文 • Previous Articles Next Articles

Assimilates Distribution in Young Peach Plants during Water Stress and afterRemoving Water Stress

Chai Chenglin¹;Li Shaohua^1*; Xu Yingchun¹; Song Wonseob²

(¹ Institute of Botany , Chinese Academy of Sciences , Beijing 100093 , China ; ² Department of Oriental Medicine Resources ,Sunchon National University , Sunchon 5402742 , Korea)

Received:2003-12-25 Revised:2004-03-19 Online:2004-10-25 Published:2004-10-25
Contact: Li Shaohua

Abstract

Abstract: Young peach plant s ( Prunus persica L. ) grown in pot s were studied to assess the effects of water stress on the distribution of assimilates among the organs during and after water stress by feeding leaves with ¹⁴CO₂ . Water st ress significantly inhibited the export of assimilates f rom the labeled leaves , and it s‘after effect’still existed after water st ress was removed. The dist ribution coefficient of ¹⁴C-assimilates ( K) of ¹⁴C-labeled shoot segment , shoot segment below ¹⁴C-labeled shoot segment increased during water
stress and remained the similar level even after removing water stress. During water stress , the K values and relative ¹⁴C-assimilate distribution (R) of young leaves and apex remarkably decreased while those of root stock phloem and fine roots significantly increased. After water stress was removed , the Kand R values were partly recovered in young leaves and apex , and they decreased to the cont rol level in root stock phloem.However the K and R values kept a same high level in fine root s after water st ress was removed as the water stressed plants. Moreover , the role of assimilate distribution on the organ growth response under water stress is discussed in this paper.

Key words: Peach, Water stress, ¹⁴C-assimilates, Distribution

CLC Number:

S 662.1

Chai Chenglin;Li Shaohua;Xu Yingchun;Song Wonseob. Assimilates Distribution in Young Peach Plants during Water Stress and afterRemoving Water Stress[J]. ACTA HORTICULTURAE SINICA, 2004, 31(5): 574-578.

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Assimilates Distribution in Young Peach Plants during Water Stress and afterRemoving Water Stress

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