Physiological studies on dormancy in grape seeds (<i>Vitis vinifera</i>) <p>1. On the naturally occurring growth substances in grape seeds and their changes during low temperature after ripening</p>

Authors

  • R. B. Kachru Division of Horticulture, Indian Agricultural Research Institute, New Delhi
  • E. K. Chacko Division of Horticulture, Indian Agricultural Research Institute, New Delhi
  • R. N. Singh Division of Horticulture, Indian Agricultural Research Institute, New Delhi

DOI:

https://doi.org/10.5073/vitis.1969.8.12-18

Abstract

In order to understand the hormonal factors affecting dormancy in grape seeds, studies were conducted on the endogenous auxins, inhibitcrs and gibberellin-like substances in the seeds stored moist at 5° C and at room temperature .The results show that moist after-ripening at 5° C resulted in an increase in the amount of growth promoting substances similar to auxins, in the extracts of chilled seeds. No correlation was observed between the content of inhibitor and dormancy in grape seeds. The extracts of neither chilled nor non-chilled seeds showed the presence of gibberellin-like substances when tested on D5 dwarf maize mutant plants.
In the light of these findings, it is proposed that an increased synthesis of growth promoting substances during stratification may be one of the factors responsible for the termination of dormancy and resumption of germination of grape seeds.

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Published

2017-02-17

Issue

Vol. 8 No. 1 (1969): Vitis

Section

Article

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