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Effects of Magnesium Deficiency on Carbohydrates in Phaseolus vulgaris
Author(s) -
Fischer Erika S.,
Bussler Wolfgang
Publication year - 1988
Publication title -
zeitschrift für pflanzenernährung und bodenkunde
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 87
eISSN - 1522-2624
pISSN - 0044-3263
DOI - 10.1002/jpln.19881510504
Subject(s) - phaseolus , starch , magnesium , sucrose , chemistry , potassium , magnesium deficiency (plants) , carbohydrate , nutrient , horticulture , botany , food science , biology , biochemistry , organic chemistry
Phaseolus vulgaris ‘Saxa’ was cultivated in quartz sand under natural light conditions in an open‐top‐chamber and supplied with either complete (1.3 mM Mg) or magnesium‐free nutrient solution. 57 days old plants showed interveinal chloroses of older leaves, decreased magnesium and increased potassium tissue concentrations in leaves and pods. Plants with magnesium supply exhibited typical diurnal changes of hexoses, sucrose and starch in trifoliate leaves. Magnesium deficiency caused retarded sucrose formation and pronounced starch accumulation in trifoliate leaves throughout the day. Soluble sugars and starch were decreased in pods of plants without Mg‐supply. The results are discussed with regard to diurnal changes of carbohydrate metabolism.