Plant Diversity ›› 2003, Vol. 25 ›› Issue (14): 1-3.
• Articles •
QIAN ChunMei,LEI YanBao,SONG SongQuan
Mung bean (Vigna radiata (Linn.) Wilczek) seeds were used as experimental materials.Changes during imbibition of mung bean seeds,and effect of preimbibition on desiccation tolerance and leakage of seeds were studied.Water uptake by seeds did not exhibit a marked “plateau phase” of imbibition.The time and thermal time required for 50% germination of seeds were 11?h and 115 degree days,respectively.Relative leakage from seeds significantly increased at the initial phase of imbibition,and then declined.Water content and survival of mung bean seeds preimbibed for different time,fresh weight of seedling and length of radicle and hypocotyls produced by surviving seeds markedly decreased with increasing dehydration.Desiccation sensitivity of seeds also dramatically increased with increasing preimbibition.Relative leakage of preimbibed seeds slowly increased at the early stage of dehydration,and then rapidly increased;and the longer preimbibition time was,the larger relative leakage increased.These results showed that the desiccation tolerance of preimbibed mung bean seeds was gradually lost by dehydration,and that desiccation sensitivity of imbibed germinative orthodox seeds can serve as a model system for studies of seed recalcitrance.
Vigna radiata seed
QIAN ChunMei,LEI YanBao,SONG SongQuan. Effect of Preimbibition on the DesiccationTolerance of Imbibed Vigna radiata Seeds[J].Plant Diversity, 2003, 25(14): 1-3.
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