Chin J Plan Ecolo ›› 1984, Vol. 8 ›› Issue (1): 15-24.

• Research Articles • Previous Articles     Next Articles

Responses of Sorghum Seedlings to Draught and Their Ability of Regulation and Adaptation

Tang Zhangcheng, Wu Yahua, Wang Yuqi, Wang Hongchun   

  • Published:1984-01-10
  • Contact: Luo Yaohua

Abstract: To simulate soil drought culture solutions with different osmotic potential (from-0.7 to-10.0 bars) were employed for sorghum growth and changes of fresh and dry weight, water potential, relative permeability, content of free proline and total free amino-nitrogen in sorghum seedling were determined in the present study carried out in phytotron. The study showed that the characteristics order of sensitivity of mentioned above to drought was as following: water potential, content of free proline and total free amino-nitrogen>relative permeability and fresh weight>dry weight, indicating that first of all drought induced changes of water status and some of metabolic processes in plants, finally decrease of accumulation of dry material. "No.5 Jin Za’ sorghum seedlings have certain ability of regulation and adaptation to drought expressed by that inhibition caused by gradual drought was less than that caused by shock drought, additionally along with prolongation of drought the changes of growth, physiology and metabolism showed a trend of detente and recover. The relationship between log content of free proline, log relative permibility, RGR based on fresh weight, and water potential of shoots was analysed and discussed.