Electrochemical wave transmission and rapid coiling movement in tendril of luffa  

作　　者：杨文定 娄成后 

机构地区：[1]Plant Physiology Laboratory,Beijing Agricultural University,Beijing 100094,China

出　　处：《Science China Chemistry》1995年第8期944-953,共10页中国科学（化学英文版）

基　　金：the National Natural Science Foundation of China.

摘　　要：The tendril of luffa (Luffa officinale),in response to various non-injurious and injuriousstimulations,will first give rise to electrochemical transmission including the action wave,variation wave,andwave complex.It is then followed by rapid coiling movement which appears within 25—30 s after stimulation.The coiling process continues for 10 min or more.When it is over,the tendril begins to uncoil itself.Tendrils pretreated with the narcotic drug,ethyl ether fail to response to stimulation entirely.Specific inhibitorsof microfilament,cytochalasins B and D,and of myosin,N-ethylmaleimide and iodoacetic acid,are both able toprevent the coiling of tendril,without any effect on the electrical wave transmission.Colchicine,known toinhibit microtubule action,is ineffective in preventing coiling.Acetylcholine is able to provoke the tendril coilingdirectly.The effects of drug pretreatments support the proposal that the electrochemical wave transmission elicitedby stimulation is the forerunner for arousing the rapid movement of the sensitive tendril that the actin and myosinare taking part in.Turgor changes in tendril cells are intimately connected with the transmitted and the motoraction of the compact tissues lining along the more sensitive ventral side of the tendril.As the ventral cellsundergo the abrupt contraction and slightly shrink,the dorsal cells become expanded in coiling.Eventually,turgotresumes normal on both sides when uncoiling occurs.The tendril of luffa (Luffa officinale),in response to various non-injurious and injurious stimulations,will first give rise to electrochemical transmission including the action wave,variation wave,and wave complex.It is then followed by rapid coiling movement which appears within 25—30 s after stimulation. The coiling process continues for 10 min or more.When it is over,the tendril begins to uncoil itself. Tendrils pretreated with the narcotic drug,ethyl ether fail to response to stimulation entirely.Specific inhibitors of microfilament,cytochalasins B and D,and of myosin,N-ethylmaleimide and iodoacetic acid,are both able to prevent the coiling of tendril,without any effect on the electrical wave transmission.Colchicine,known to inhibit microtubule action,is ineffective in preventing coiling.Acetylcholine is able to provoke the tendril coiling directly.The effects of drug pretreatments support the proposal that the electrochemical wave transmission elicited by stimulation is the forerunner for arousing the rapid movement of the sensitive tendril that the actin and myosin are taking part in.Turgor changes in tendril cells are intimately connected with the transmitted and the motor action of the compact tissues lining along the more sensitive ventral side of the tendril.As the ventral cells undergo the abrupt contraction and slightly shrink,the dorsal cells become expanded in coiling.Eventually,turgot resumes normal on both sides when uncoiling occurs.

关 键 词：TENDRIL COILING electrical wave transmission protoplasmic CONTRACTION LUFFA cylindrica 

分 类 号：Q947[生物学—植物学]