Iron-deficiency-induced chlorosis is a widespread nutritional disorder in grapevine, in particular when alkaline or calcareous soils are concerned. A temporary solution of the problem could be the utilization of Fe-chelates directly supplied through foliar spray or as application to the soil. Since Fe-efficiency is genetically determined a possible long term solution might be the development of genotypes resistant to iron-chlorosis. Plants can respond to Fe-deficiency by inducing biochemical modifications resulting in an increase in the availability of the soluble forms of Fe in the rhizosphere. Increased medium acidification and Fe(3+) reduction, brought about by plasmalemma localized H(+)-ATPase and NADH:Fe(3+)-reductase activities, respectively, were among the most important responses in strategy I plants. The possibility of using these two activities as determinants of Fe-efficiency in grapes seems to be realistic as a method of selecting efficient rootstock genotypes in a screening program. Eleven new interspecific hybrids were tested for their resistance to Fe-deficiency by measuring their abilities to acidify the medium and to reduce Fe(3+) For a better evaluation of the results, It vinifera cv Cabernet Sauvignon were employed as references. These activities varied widely among the hybrids tested, We can define two groups: the first as efficient in its response to iron-chlorosis and the second as less efficient in the response to this nutritional disorder.
Use of biochemical parameters to select grapevine genotypes resistant to iron-chlorosis / M. Dell’Orto, L. Brancadoro, A. Scienza, G. Zocchi. - In: JOURNAL OF PLANT NUTRITION. - ISSN 0190-4167. - 23:11-12(2000), pp. 1767-1775.
|Titolo:||Use of biochemical parameters to select grapevine genotypes resistant to iron-chlorosis|
BRANCADORO, LUCIO (Secondo) [Methodology]
ZOCCHI, GRAZIANO (Ultimo)
|Parole Chiave:||IRON-CHLOROSIS; GRAPEVINE; ROOTSTOCK; DEFICIENCY; SOILS|
|Settore Scientifico Disciplinare:||Settore AGR/03 - Arboricoltura Generale e Coltivazioni Arboree|
Settore AGR/13 - Chimica Agraria
|Data di pubblicazione:||2000|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1080/01904160009382140|
|Appare nelle tipologie:||01 - Articolo su periodico|
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