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Physiological Responses of Papaya (Carica papaya L.) Plants to Flooding

By Nguyen Trinh Nhat Hang, Yau-Shiang Yang, 楊耀祥 and 阮一月


'Da moc'、'Jampada'、'Philippines Wild'及'台農二號'四種番木瓜栽培種之砂耕盆栽植株,在溫室內以淹水處理3天,全部的供試植株之鮮童及乾重均呈下降。'Da moc'及'Jampada'兩栽培種之葉片較早發生凋萎現象。在淹水處理3天後,葉片的總葉綠素含量呈下降,且與淹水處理前有顯著差異。淹水處理l天後葉片光合成作用未受影響。但是,淹水處理3天後,其葉片的光合成速率迅速下降。'Philippines Wild'及'台農2號'約為淹水處理前的30-40%,'Jampada'及'Da moc'幾乎無光合成能力。在淹水處理後l天,各栽培種根部之乙烯生成量皆呈上升,處理後3天則降低至一半左右。在淹水處理3天的期間內,栽培種之間的根部酒精去氫酵素活性有顯著差異,耐水較強的'Philippines Wild'及'台農2號'有較高的活性。顯示不同栽培種對淹水逆境有不同的生理反應。Potted papaya(Carica papaya L.)plants of four cultivars, ‘Damoc', ‘Jampada', ‘Philippineswild' and ‘Tainung No.2', grown in sand culture were subjected to flooding for 3days under green-house condition. Flooding caused a reduction in plant fresh and dry weight in all cultivars. Leaf wilting appeared earlier in ‘Da Moc' and ‘Jampada'. Total leaf chlorophyll decreased by flooding treatment. After one days of flooding there was no effect on leaf photosynthesis. However, photosynthesis rate was significantly reduced after three days of flooding. The photosynthesis rate reduced about 30-40 percent in ‘Tainung No.2' and ‘Philippines wild' after three days of flooding. Furthermore, the leaves of 'Da moc' plants showed wilting symptom. The ethylene production was increased in all cultivars after one day of flooding and reduced on the following days. There were significant different in the activity if alcohol dehydrogenase in root among cultivars during 3 days of flooding

Topics: Carica papaya, Flooding, Photosynthesis, Plant growth, 番木瓜, 淹水, 光合成作用, 植株生長
Year: 2014
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