JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2014, Vol. 38 ›› Issue (02): 105-110.doi: 10.3969/j.issn.1000-2006.2014.02.020

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A comparison of seasonal dynamics of nonstructural carbohydrates for deciduous and evergreen landscape trees in subtropical region, China

OUYANG Ming, YANG Qingpei*, QI Hongyan, LIU Jun, MA Siqi, SONG Qingni   

  1. Jiangxi Province Key Laboratory for Bamboo Germplasm Resources and Application, College of Landscape and Art, Jiangxi Agricultural University, Nanchang 330045, China
  • Online:2014-03-10 Published:2014-03-10

Abstract: Non-structural carbohydrate(NSC)is a good indicator for plant adaptation to the environment. In order to investigate different life form plants adapting to the way of subtropical climate, the content of NSC(soluble sugar and starch)in the leaves and branches of two common deciduous and evergreen landscape tree species in subtropical region were measured seasonally.The results showed that(1)The content of NSC in leaves was different between deciduous and evergreen trees, the soluble sugar was 15.71% in deciduous tree species, while it was up to 19.24% in evergreen trees.(2)The content of all NSC components in leaves and branches of two life form trees showed significant seasonal dynamics,with a rising trend of soluble sugar, a falling trend of starch in two kind of leaves. The content of soluble sugar in one-year-old branch showed a rising trend in two life forms, a “∧” shape of starch for deciduous and a falling trend for evergreen trees. But the seasonal dynamic rate of the soluble sugar in leaves and the starch in branches were faster for deciduous trees than that for evergreen trees.(3)There was a significant negative relationship between the contents of the soluble sugar in leaves and starch in perennial branches for deciduous trees, but not for one-year-old branches. The contents of the soluble sugar in leaves and one-year-old branches were significantly and positively correlated for evergreen trees. These studies indicated that there were different mechanisms of sugar transformation and translocation between deciduous and evergreen trees to adapt subtropical climate.

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