Assessment of Fe status of peach rootstocks by techniques used to distinguish chlorotic and non‐chlorotic leaves1

Autor:	G. A. Couvillon, J. B. Jones, Amirul Abd Rashid
Rok vydání:	1990
Předmět:	Chlorosis biology Physiology Rosaceae Xylem biology.organism_classification chemistry.chemical_compound chemistry Soil pH Chlorophyll Botany Savia Cultivar Rootstock Agronomy and Crop Science
Zdroj:	Journal of Plant Nutrition. 13:285-307
ISSN:	1532-4087 0190-4167
DOI:	10.1080/01904169009364074
Popis:	Peach rootstocks Lovell, GF677, Siberian‐C and Nemaguard were grown for Fe efficiency evaluation under high nutrient solution pH. Various techniques were employed to assess the Fe status of plants. Total leaf and 2% acetic acid extracted Fe concentration were not able to distinguish between chlorotic and non‐chlorotic leaves. O‐Phenanthroline extraction does not seem to be sufficiently sensitive to distinguish between moderately chlorotic and green leaves. Xylem sap Fe concentration did not correspond with the leaf Fe concentration of the same rootstock which indicates its non‐suitability for the assessment of Fe translocation ability of rootstocks. P/Fe and K/Ca ratios were not found to be good indicators of Fe deficiency. Leaf chlorophyll content increased as the Fe concentration in the nutrient solution increased. Leaf chlorophyll content was a reliable criterion for assesssing the active Fe status of the plants. On the basis of the correlation between leaf chlorophyll content and Fe treatment...
Databáze:	OpenAIRE
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