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盐胁迫对杨树无性系生理特性及高生长的影响(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
1994年04期
Page:
13-18
Column:
研究论文
publishdate:
1900-01-01

Article Info:/Info

Title:
THE EFFECT OF NaCl ON HEIGHT GROWTH OF POPLAR SEEDLINGS, FREE PROLINE AND K~+, Na~+, Cl~- ACCUMULATION IN LEAVES
Article ID:
1000-2006(1994)04-0013-06
Author(s):
Lu Shixing; Lu Zhiying; Xu Xizen; Cao Fuliang; Fang Shenazuo
College of Forest Resources and Environment Nanjing Forestry University Nanjing 210037
Keywords:
: New poplar clonesSalt stressFree prolineRelative height growth rate
Classification number :
-
DOI:
10.3969/j.jssn.1000-2006.1994.04.003
Document Code:
A
Abstract:
Salt-stress inhibits the height growth of poplar seedlings significantly, and the rate of height growth decreases with the lasting of salt-stress and increase in salinity from 0. 1 % to 0. 3%. Meanwhile, the accumulation of Cl~- and Na~+ in leaves increases. Free proline accumulation in leaves culminates after 2~ 3 days of salt stress, K~+ accumulation increases rapidly after about 2 weeks of Salt stress, both of which decrease after the culmination with the extension of salt stress. The absorption by poplar seedlings of Cl~- and Na~+ doesn’t take place simultaneously. In later sarge of salt stress the value of Na~+ /Cl~- rises gradually. Under 0. 3% level of salinity, this value may reach 1. 5, and the rise of Na~+/K~+ value results from the increase of Na~+ absorption and the decrease of K~+. External K~+ and Ca~2+ can reduce the inhibition of salt stress to height growth to a certain degree, but the effect of K~+ is not as good as that of Ca~2+.

References

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Last Update: 1900-01-01