Effect of exogenous gibberellin on endogenous hormone content and development of 'Black Corinth' grapes

Authors

  • D. E. Bertrand Department of Viticulture and Enology, University of California, Davis
  • R. J. Weaver Department of Viticulture and Enology, University of California, Davis

DOI:

https://doi.org/10.5073/vitis.1971.10.292-297

Abstract

The relationship between growth and development of potassium gibberellate (KGA3 )-treated 'Black Corinth' berries and changes in the level of hormones was studied from anthesis to maturity. Growth rate curves for fresh weight and volume had peaks corresponding to stages I and III. The curve for dry weight showed only one large pea k that occurred in stage III. Associated with the first period of rapid growth (stage I) was a rapid increase in concentration of hormone. Application of KGA3 increased auxin activity within 3 hours after treatment, and berries from KGA3-treated vines maintained a higher level of auxin activity during stage I and stage II than did berries from untreated vines. Hormone content decreased during the period of retarded growth (stage II), and continued at a low level until harvest.

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Published

2017-02-17

Issue

Vol. 10 No. 4 (1971): Vitis

Section

Article

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