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Seed germination and seedling growth responses of tomato cultivars to imposed water stress
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1987
Year
EngineeringBotanyWater StressAgricultural EconomicsTomato CultivarsPlant PathologyCrop PhysiologyPlant Growth RegulatorImposed Water StressPlant StressCrop EstablishmentPlant-abiotic InteractionCrop Water RelationSummarythe GerminationWater PotentialBiologyDroughtNatural SciencesSeed GerminationSeed StorageWater PotentialsPlant Physiology
SummaryThe germination and seedling growth of tomato cvs Arka Saurabh, Pusa Ruby, Pusa Early Dwarf (PED), Arka Vikas and a wild sp. L. pimpinellifolium were studied under water potentials induced by polyethylene glycol-6000. Germination declined progressively in response to decreasing (more negative) water potentials. Germination in all cultivars occurred within 24 h after priming the seeds for 10 days at –0.6 MPa. The critical value of water potential for germination was found to be –0.4 MPa in nearly all the cultivars. A less negative critical water potential exists for the initiation of radicle growth (germination) than for growth itself. The water-sensitive phase of germination in tomato occurs prior to radicle growth.