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低温处理对6种园林绿化树种幼苗生理生化特性的影响(PDF)

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

Issue:
2009年03期
Page:
139-142
Column:
论坛
publishdate:
2009-05-30

Article Info:/Info

Title:
Effects of low temperature treatment on physiologicalbiochemical characteristics of six seedlings
Author(s):
WANG Xiange1 XUE Li1* XIE Tengfang1 HE Yuejun12
1.College of Forestry, South China Agricultural University, Guangzhou 510642, China; 2.International Centre for Bamboo and Rattan, Beijing 100102, China
Keywords:
low temperature stress tropics and subtropics seedlings cold resistance Guangdong
Classification number :
S715.3
DOI:
10.3969/j.jssn.1000-2006.2009.03.032
Document Code:
A
Abstract:
In order to select strong coldresistant tree species, seedlings of six tropical and subtropical species (Dillenia turbinata, Peltophorum tonkinense, Garcinia oblongifolia, Alstonia scholaris, Khaya senegalensis and Ormosia pinnata) were treated with the lasting times of 0.5, 3, 5 and 8 d at 10℃ respectively. The changes of physiological indices of these seedling were studied. The results showed that with low temperature stress time increasing, the relative electric conductivity of six seedlings tended to increase, the contents of free proline fluctuated rapidly, and the chlorophyll contents fluctuated slightly, whereas the contents of MDA generally increased and then decreased. Except for D.turbinata, the activities of SOD were closed to the controls after fluctuation. With increasing low temperature, the contents of soluble protein of six tree species were greater than or closed to the controls after fluctuation. Cold resistance of six seedlings was evaluated using principal component analysis and the their cold resistance was O.pinnata, K.senegalensis, A.scholaris, G.oblongifolia, P.tonkinense, D.turbinate.

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Last Update: 2009-05-30