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- W2361223831 abstract "The effect of high temperature on ethy-lene production by two plant tissues was in-westigated in connection with the steps ofbiosynthesis pathway of ethylene. Respon-ses to high temperature of plant tissues of twospecies differing in thermophily were different.It was observed that ethylene production inwheat leaves began to be inhibited at 35℃and was severely inhibited at 40℃(Fig. 1).However, ethylene production in soybean hy-pocotyls increased with an increase of tempera-ture to 40℃, and was inhibited at 45℃(Fig.5). Responses of different steps in the biosyn-thesis pathway of ethylene to high tempeaturewere also different. At 40℃ ACC accumula-tion occured in both plant tissues (Fig. 2,6).In soybean hypocotyls such accu mulationappeared simul taneously with the increaseof ethylene pro duction, indicating a markedpromotion of ACC synthesis. In wheat leavesthe ACC accumulation occurred when theethylene production was inhibited, implyingthat the conversion of ACC to ethylene is theprimary site of high temperature inactivation.The transfer of wheat leayes after a shortexposure to high temperature (40℃) tonormal growth. temperature (18℃) resultedin a greatly increased ethylene productionafter a lag-period of an hour (Fig. 8). Themechanism of such overshoot ethylene pro-duction. is that the temporarily damagedethylene-forming system recovered its func-tion following the transfer to normal growthtemperature which caused the conversionof accumulated ACC to ethylene. There-fore, as a stress, high temperature stimula-tes the synthesis of ACC just like other stres-ses. Since the ethylene--forming system whichconverts ACC to ethylene is damaged byhigh temperature, no increase in ethylene pro-duction occurs in spite of the increased ACCcontent. If the exposure to high tempera-ture is short and the extent of damage ofethylene-forming system is still within thelimit of reversibility, after a lag-period forrecovery of ethylene-forming system there isa surge of ethylene production when the tissueis transferred to normal growth temperature.This is a special case of stress ethylene. Differing from other stresses, such asdrought, water-logging and SO_2 exposure,high temperature did not cause markedchange in MACC contept. This implies thatmalonyl-transferase which converts ACC toMACC is also sensitive to high temperature." @default.
- W2361223831 created "2016-06-24" @default.
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- W2361223831 date "1988-01-01" @default.
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- W2361223831 title "Effect of High Temperature on Etnylene Production in Two Plant Tissues" @default.
- W2361223831 hasPublicationYear "1988" @default.
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