In:
Journal of Plant Nutrition and Soil Science, Wiley, Vol. 184, No. 1 ( 2021-02), p. 142-149
Kurzfassung:
Background : Presently, irrigation waters often have a high concentration of boron (B), and the fruit trees in the Mediterranean areas, in general, are exposed to a high risk of B toxicity. Aims : To test the hypothesis that pomegranate trees are very tolerant to the presence of B in the irrigation water, to elucidate the physiological mechanisms behind this tolerance, and to assess differences between different varieties. Methods : In this study, the physiological and nutritional behavior of three pomegranate cultivars (‘Mollar de Elche', ‘Valenciana', and ‘Wonderful'), treated with five B concentrations (0.25, 1.25, 2.5, 5.0, 10.0 mg L −1 ), were studied. At day 30 and 60 after the start of the treatments, growth measurements, gas exchange parameters and organic solutes were recorded. Results : Almost no significant differences were observed between the B treatments for any of the cultivars. Increasing the B concentration in the nutrient solution increased B concentrations in the leaves, but they never exceed 40 mg kg −1 of B. In the roots, however, B concentrations were very high, up to 400 mg kg −1 . Conclusion : Pomegranate trees are very tolerant to B excess due to their ability to accumulate B in great quantities in the root, without causing toxicity to this part of the plant, thus limiting its transport to the shoots.
Materialart:
Online-Ressource
ISSN:
1436-8730
,
1522-2624
DOI:
10.1002/jpln.202000301
Sprache:
Englisch
Verlag:
Wiley
Publikationsdatum:
2021
ZDB Id:
1481142-X
ZDB Id:
1470765-2
ZDB Id:
200063-5
SSG:
12
SSG:
13
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