ACTA AGRICULTURAE BOREALI-SINICA ›› 1991, Vol. 6 ›› Issue (1): 68-73. doi: 10.7668/hbnxb.1991.01.012

Special Issue: Drought and water saving

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The Effects of Osmotic Adjustment in Sorghum Leaves on Stomatal Conductance and Transpiration Rate under Water Stress

WangYuguo, JingJiahai, WangShaotang   

  1. Shanxi Agricultural University, Taigu 030801)Jing Jiahai Wang Shaotang(Northwestern Agricultural University, Yangling 712100
  • Received:1989-07-21 Published:1991-03-28

Abstract: Osmotic adjustment capacity and its effect on stomatal conductance and transpiration rate were studied using seedling of two sorghum cultivars different in drought resistance (CV. 3197B, drought-resistance and San Chi San, drought susceptible) under water stress. The results showed that 3197B had a more negative osmotic potential and a higher osmotic adjustment. At normal moisture scheme, stomatal conductance and transpiration rate of both cultivars increased with the increase of solor radiation, and San Chi San exhibited a slightly higher conductance. Under water stress, the stomatal conductance and transpiration rate of 3197B were higher in the morning and lower in the afternoon than those of San Chi San, but water potential and turgor potential of the former were higher than the latter.

Key words: Sorghum, Water stress, Osmotic potential, Osmotic Adjustment, Stomatal conductance, Transpiration rate

Cite this article

WangYuguo, JingJiahai, WangShaotang. The Effects of Osmotic Adjustment in Sorghum Leaves on Stomatal Conductance and Transpiration Rate under Water Stress[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1991, 6(1): 68-73. doi: 10.7668/hbnxb.1991.01.012.

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