Effects of Drought Stress on Establishment and Distribution of Plant Fresh Weight in Semi-determinate Soybean(Glycine max L.Merill) Varieties(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:

2011年04期

Page:

609-612,620

Research Field:

Publishing date:

Info

Title:

Effects of Drought Stress on Establishment and Distribution of Plant Fresh Weight in Semi-determinate Soybean(Glycine max L.Merill) Varieties

Author(s):

LIU Feng¹; NING Hai-long¹; LIU Jian-li¹; LI Hai-xu¹; HUAN Hai-sheng²; LI Wen-bin¹

1.Soybean Biology Key Laboratory of Educational Ministry,Soybean Research Institute,Northeast Agricultural University,Harbin 150030；?

2.Agricultural Technology Spreading Center of Songjiang Town,Jiamusi 154007,Heilongjiang,China

Keywords:

Soybean; Drought stress; Plant fresh weight; Distribution

PACS:

S565.1

DOI:

10.11861/j.issn.1000-9841.2011.04.0609

Abstract:

In order to analyze the effects of drought stress(DS) on distribution of photosynthetic products in soybean,two semi-determinate soybean cultivars were grown under greenhouse conditions and subjected to drought stress at initial flowering(R1),initial seed-filling(R3)and whole growth stage(V1-R7)，respectively.Plants were sampled at R7 and fresh weights of each organ as well as nodule number were determined.Fresh weight of petiole,leaf,stem,pod shell,seed,root,nodule and nodule number decreased as the increase of DS under different stages.Ratio of aboveground fresh weight to total fresh weight decreased as the increase of DS at whole growth stage and initial flowering,while increased under DS at initial seed-filling.As the degree of DS increased,ratio of fresh weight of petiole,leaf and stem to aboveground fresh weight and that of root to underground part increased,while ratio of fresh weight of pod shell,seed and root nodule to their counterpart decreased.Results suggest that DS at whole growth stage and initial flowering accelerate the distribution of photosynthetic products to underground part,while to aboveground part for DS at initial seed-filling.For aboveground part,DS promote the distribution of photosynthetic product to petiole,leaf and stem,while DS promote the distribution of photosynthetic product to root for underground part.

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