Effect of environmental factors during seed development and maturation on seed quality in Sorghum bicolor (L.) Moench

    Tonapi, V A and Varnavasiappan, S and Navi, S S and Ravinder Reddy, Ch and Karivatharaju, T V (2006) Effect of environmental factors during seed development and maturation on seed quality in Sorghum bicolor (L.) Moench. Plant Archives, 6 (2). pp. 515-519. ISSN 0972-5210

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    Abstract

    Studies were conducted to evaluate the effect of environmental conditions on physiological characteristics of seeds of sorghum genotypes viz., CO 24, CO 25, CO 26 and JH 35 during seed development and maturation. In the present study, a steady decline in moisture content of the seed was observed. Length and width of seed increased rapidly between seven to 35 days after 50 per cent flowering. A steep increase in the dry weight of seed was registered between 14 and 35 days after 50 per cent flowering, beyond that the increase was gradual. Water absorption per cent declined from 16.5 to 12.0 per cent between 7 to 28 days and increasing steadily beyond 42 days (22.1 per cent) after 50 per cent flowering. The germination potential of seeds improved with seed development and maturity. The root length, shoot length, dry weight of seedling, field emergence, seed recovery, seed yield and vigour index were highest in seeds harvested at 35 and 42 days after 50 per cent flowering. Seed vigour as estimated through stress tests viz., soaking seeds in ammonium chloride and D-manitol and accelerating ageing and exhaustion tests revealed the superiority of seeds having maximum germinability, vigour and viability at 35 and 42 days after 50 per cent flowering. These stages respectively correspond to physiological and harvestable maturity.

    Item Type: Article
    Divisions: UNSPECIFIED
    CRP: UNSPECIFIED
    Uncontrolled Keywords: Environment factors; seed development; seed quality; sorghum
    Subjects: Mandate crops > Sorghum
    Depositing User: Users 6 not found.
    Date Deposited: 25 Nov 2011 08:45
    Last Modified: 25 Nov 2011 08:45
    URI: http://oar.icrisat.org/id/eprint/4359
    Official URL:
    Projects: UNSPECIFIED
    Funders: UNSPECIFIED
    Acknowledgement: UNSPECIFIED
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