Abstract:

For studying banana response on low temperature at high and middle humidity level, and for providing technology service for banana plantlet production when chilling coming. Effect of low temperature treatments on banana plantlets grown under different humidity was tested. The results showed that chilling injury to banana plantlets in the high humidity (RH>90%) condition was significantly lighter than in the middle humidity (60%-70%) condition under the same low temperatures. Under high humidity, the plantlets have 90% higher water content and strong dehydration resistance compared with the middle humidity, about 62.15% water content and fade when 6℃ chilling reaches. The physiology parameter, rate of cell membrane leakage, MDA of plantlet treated was tested, and the results showed that 6oC chilling at middle humidity lead to the 24.40% higher MDA content than high humidity, and high humidity can delay the increase of membrane leakage rate, MDA content when treated with chilling, and chilling injury on cell membrane in high humidity was gentler than it in middle humidity.