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Effects of High Temperature on the Variation and Transport of Endogenous Cytokinins during the Germination of Chick-pea Seeds

Authors
Journal
Journal of Plant Physiology
0176-1617
Publisher
Elsevier
Publication Date
Volume
132
Issue
2
Identifiers
DOI: 10.1016/s0176-1617(88)80165-2
Keywords
  • Cicer Arietinum L. Var. Castellana
  • High Temperature
  • Endogenous Cytokinin
  • Variation
  • Transport
  • Seed Germination

Abstract

Summary Chick-pea seeds have an optimal germination temperature of 25°C. A temperature of 30°C induces a delay of approximately 24 hours in the germination of these seeds and also a 24–36 hours delay in the appearance of cytokinins in the cotyledon, the transformation of glycosides into free bases and of free bases into dihydroderivatives. The transport of cytokinins from the axis to the cotyledon also undergoes a similar delay and as at 25°C no passage of cytokinins from the cotyledon to the embryonic axis can be detected. On the 5th day of the period studied, the delay occurring in germination and levels of cytokinins as compared with normal conditions is less pronounced, there already being a diminished effect of high temperature. The cytokinins evaluated and identified when the seeds were germinated at 30°C were the same as those observed when germination took place at 25 °C.

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