|Table of Contents|

Drought Stress Influence Soybean Yield Morphogenesis in Different Growth Stages(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2011年03期
Page:
405-412
Research Field:
Publishing date:

Info

Title:
Drought Stress Influence Soybean Yield Morphogenesis in Different Growth Stages
Author(s):
LIU Li-jun;  LIN Hao;  TANG Xiao-fei;  PU Guo-feng
Soybean Research Institute, Heilongjiang Academy of Agricultural Sciences, Harbin 150086, Heilongjiang, China
Keywords:
Soybean;  Drought stress;  Yield
PACS:
S565.1
DOI:
10.11861/j.issn.1000-9841.2011.03.0405
Abstract:
Seasonal drought is a main environmental factor limited soybean yield in northeast China. Our objective was to determine how drought stress imposed on soybean [Glycine max (L.) Merr.] at various growth stages affected plant characteristics. Twelve soybean cultivars were grown under greenhouse conditions and subjected to normal water supply (17%-18%soil-available water) and drought stress (8%-9%soil-available water) during seedling (V1-V5), flowering (R1-R4) and seed filling (R5-R8) stages. Root morphological traits including length, diameter, volume and surface area were all promoted by stress during seedling, while were inhibited by stress in other periods. Dry matter accumulation was decreased and root/shoot ratio was increased by stress in all tested periods. Drought stress at three periods all declined photosynthetic rate(Pn), and stress at flowering and seed-filling declined intercellular CO2 concentration(Ci), transpiration rate(Tr) and stomatal conductance (Cond). The decrease of seed yield caused by stress varied with varieties significantly. The performance of drought tolerance varied with growth periods, only a few cultivars showed resistant to drought stress at all growth stages.

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Last Update: 2014-09-12