Seed germination and seedling growth of mung bean (Vigna radiata) under water stress induced by PEG-6000
1995
De, R. | Kar, R.K. (Visva-Bharati Univ., Santiniketan (India). Department of Botany, Plant Physiology and Biochemistry Laboratory)
Seed germination and seedling growth of mung bean (Vigna radiata (L.) Wilczek) were studied at different levels of water stress induced by PEG-6000. Both germination and seedling growth (root and shoot length) declined with increasing water stress. Increase in fresh weight was also prevented by water stress. When a short term (24 hours) water stress was imposed on different days during incubation, both root and shoot growth were relatively less affected in case of seedlings exposed to PEG solution on 2nd and 5th day after the start of imbibition. Exposure of seeds to changing water potential at the beginning of incubation, when imbibition did not start, affected germination during subsequent days of incubation. When the water stress was imposed on germinated seeds after radicle emergence in distilled water, root growth was not much affected up to -1.0 MPa
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