ISSN:
1573-5036
Keywords:
β-naphthoxy acetic acid (NOA)
;
calcium
;
gibberellin
;
heat
;
tomato
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Abstract Two cultivars of tomato with contrasting response to elevated temperature were compared: sensitive-Roma and tolerant-Robin. Experiments were done on fruit explants and on rooted cuttings with small fruits. In both cases45Ca was poorly transported to the fruits. Nevertheless in fruit explants elevated temperature (40°C) increased45Ca import into the fruits in both cultivars. In the compared cuttings, treated or not treated with growth regulators and at various temperatures, the greatest differences were observed in the amount of45Ca transported to the fruits. Sensitive Roma cuttings scantily supplied their fruits with45Ca both under optimal temperature and heat stress. In plants previously treated with NOA+GA3 high temperature increased45Ca transport to the fruits. Robin cuttings inversely responded to heat stress by transporting a much higher portion of45Ca to the fruits, both in control and NOA+GA3 cuttings. The diversity of45Ca distribution during elevated temperature in cuttings, but not in fruit explants of both cultivars seems to be connected with an ability to control calcium supply to fruit or at least to prevent its decrease; this mechanism is perhaps located outside the cluster.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01587609
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