水分处理对榆树幼苗不同器官非结构性碳水化合物的影响

doi:10.13866/j.azr.2019.01.13

Abstract

Abstract: Two-year-old Ulmus pumila seedlings were grown under suitable water,mild,moderate and severe drought treatments.The soluble sugar,starch and non-structural carbohydrate (NSC) contents in different organs of the seedlings were measured after the drought treatment for 15,30,45 and 60 days.The results showed that,on the 15th day of treatment,the soluble sugar contents in leaves and fine roots decreased with the increase of drought level,and the starch content in leaves under moderate and severe drought treatments reduced to the minimum value (18.35±0.06)mg·g^-1.The soluble sugar contents in stems and coarse roots under severe drought treatment were significantly lower than those under other treatments.On the 30th day of treatment,the starch and NSC contents in leaves increased with the increase of drought degree,and the starch content in leaves under severe drought treatment increased to the maximum value (47.83±0.27)mg·g^-1.The starch and NSC contents in stems and coarse roots under mild drought treatment were lower than those under suitable water treatment.On the 45th day of treatment,the ratio of soluble sugar and starch in fine roots decreased with the increase of drought level.The soluble sugar content,ratio of soluble sugar and starch in leaves and the starch in stems under severe drought treatment were significantly higher than those under other treatments.On the 60th day of treatment,the ratio of soluble sugar and starch in leaves and fine roots gradually increased with the increase of drought degree.The soluble sugar,starch and NSC contents in coarse roots under severe drought treatment were significantly higher than those under other treatments,and the content of NSC increased to the maximum value (68.88±1.01)mg·g^-1.The above results indicated that soluble sugar,starch and NSC in all organs of U.pumila seedlings differently responded with the increase of treatment time.The NSC in each organ decreased and accumulated in coarse roots.This provides an evidence for water management of U.pumila protection forest in Horqin sandy land.

Key words: Ulmus pumila Linn., seedling, organ, non-structural carbohydrate, Horqin sandy land

WANG Kai, ZHAO Cheng-jiao, LIN Ting-ting, YU Guo-qing, SUN Ju. Effects of Different Water Treatments on Non-Structural Carbohydrates in Different Organs of Ulmus pumila Seedlings in the Horqin Sandy Land[J].Arid Zone Research, 2019, 36(1): 113-121.

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Effects of Different Water Treatments on Non-Structural Carbohydrates in Different Organs of Ulmus pumila Seedlings in the Horqin Sandy Land

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