【摘要】 本文研究了番茄成熟时呼吸跃变期,乙烯产生及过氧化物酶活性之间的关系,观察了氧分压,二氧化碳分压对乙烯产生,过氧化物酶活性及同功酶的影响。发现乙烯产生和呼吸跃变期之间是平行的关系。绿熟期用乙烯处理促进跃变期的出现。低氧分压和高二氧化碳分压抑制乙烯产生。结果指出,成熟过程中三个时期过氧化物酶活性明显不同,其中半红果最高,绿熟果和全红果低于半红果。乙烯提高过氧化物酶活性;低氧分压降低酶活性。结果还指出,在番茄发育的不同阶段过氧化物酶的同功酶明显不同。绿熟果比幼果少一个带,半红果比绿果多两个带,红果又少两个带。用乙烯处理后明显地增加一个同功酶带。更多还原

【Abstract】 Climacterie rise, ethylene production, peroxidase activity and its isozyme and their interrelationships during the ripening of tomato fruits have been studied. It was found that there was parallelism between ethylene production and climacteric rise. The climacteric rise of tomato fruits was hastened by ethylene applied at the mature green stage. The ethylene production was inhibited by low oxygen and high carbon dioxide partial pressure. The peroxidase acti,eity in the tomato fruits appeared to be different at three stages, higher in the half red fruits and lowet in both green mature and fully red fruits. This activity was increased by ethylene and decreased by lower partial pres- sure of oxygen. The peroxidasc isozymes appeared also different at different stages of ripening. There were 4 bands in young fruits, 3 in green mature fruits, 5 in half red fruits and 3 in fully red frufits. After the application of ethylene to the tomato fruits, there appear one new band of peroxidase isozyme.更多还原