Dynamics of respiration pathway in transgenic salt-tolerant wheat and its receptor under salt stress

Abstract

Abstract: Using transgenic salt-tolerant wheat 89122 and its receptor Longchun 13 as test material, the dynamic changes of respiration pathway of wheat seedlings at different salt concentration were studied.The appearance of salt respiration was later in 89122 than in Longchun 13.The changes of V_alt and ρV_alt of both varieties had different patterns during salt stress process.V_alt was suppressed by high salt levels, but could be induced by low salt levels in Longchun 13. The ρV_alt and ρ'V_cyt of two varieties were cooperatively regulated with each other to adapt to salt stress,and ρ'V_cyt was the main electron transport pathway.The possible physiological roles of cyanide-resistant respiration were also discussed.It was suggested that the operation intensity of cyanide-resistant respiration could serve as a physiological index of plant salt-tolerance.

Key words: Salt stress, Transgenic wheat, Respiration pathway

KONG Yingzhen, ZHOU Gongke, CUI Kairong, WANG Yafu, LI Hongyu. Dynamics of respiration pathway in transgenic salt-tolerant wheat and its receptor under salt stress[J]. Chinese Journal of Applied Ecology, 2000, (6): 873-877.

References

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