异硫氰酸苄酯对番木瓜果肉组织中乙烯释放的抑制作用。
Inhibition of ethylene evolution in papaya pulp tissue by benzyl isothiocyanate.
作者信息
Patil S S, Tang C S
机构信息
Department of Plant Pathology and Department of Agricultural Biochemistry, University of Hawaii, Honolulu, Hawaii 96822.
出版信息
Plant Physiol. 1974 Apr;53(4):585-8. doi: 10.1104/pp.53.4.585.
Papaya (Carica papaya L.) pulp tissue disks in an incubation medium composed of 0.4 m sucrose evolve ethylene at an optimum pH of 5.25 at 30 C. Disks of young preclimacteric fruit evolve the gas linearly with fruit age until fruit age reaches 4 months. Disks from 5-month-old postclimacteric fruit produce approximately 5-fold more ethylene than disks from 4-month-old fruit. Ethylene evolution by unaged papaya disks is inhibited potently by benzyl isothiocyanate. The compound inhibits production of ethylene by approximately 60% at a concentration of 0.046 mm. However, in aged papaya disks benzyl isothiocyanate causes no inhibition of ethylene production indicating that the compound inhibits the induction of the ethylene-producing system rather than the evolution of the gas per se. Even at a 2-fold higher concentration benzyl isothiocyanate has no effect on respiration of unaged papaya disks. It is proposed that benzyl isothiocyanate may act as an endogenous regulator of ethylene evolution in papaya fruit.
番木瓜（番木瓜属番木瓜）果肉组织圆盘置于由0.4 m蔗糖组成的孵育培养基中，在30℃、最适pH值为5.25时会释放乙烯。未成熟的更年前期果实的圆盘随着果实成熟度的增加线性释放该气体，直至果实成熟度达到4个月。来自5个月大的更年后期果实的圆盘产生的乙烯比来自4个月大果实的圆盘多约5倍。未成熟的番木瓜圆盘释放乙烯的过程会被异硫氰酸苄酯强烈抑制。该化合物在浓度为0.046 mm时可抑制约60%的乙烯生成。然而，在成熟的番木瓜圆盘中，异硫氰酸苄酯不会抑制乙烯生成，这表明该化合物抑制的是乙烯生成系统的诱导，而非气体本身的释放。即使浓度高出两倍，异硫氰酸苄酯对未成熟的番木瓜圆盘的呼吸作用也没有影响。有人提出，异硫氰酸苄酯可能作为番木瓜果实中乙烯释放的内源性调节剂。
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