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Einfluß von Calcium auf den Beulenbrandbefall und die Salztoleranz von Mais bei Chlorid‐ und Sulfatsalinität
Author(s) -
Kostandi S. F.,
Soliman M. F.
Publication year - 1998
Publication title -
journal of phytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 60
eISSN - 1439-0434
pISSN - 0931-1785
DOI - 10.1111/j.1439-0434.1998.tb04678.x
Subject(s) - salinity , biology , smut , agronomy , cultivar , irrigation , saline , inoculation , sodium , horticulture , zoology , chemistry , ecology , organic chemistry , endocrinology
The effect of sahne irrigation water containing NaCl or Na 2 SO 4 with and without CaSO 4 application on the gram yield, smut index and plant nutrient contents of two intermediate smut‐susceptible corn cultivars was investigated in cemented plots containing sandy loam soil. The plants were artificially infected and the disease severity was rated. At the end of silking stage, the leaf C1, Na and Ca contents were detected and Ca/Na ratio was calculated. At harvest, the grain yield of smut‐free and smutted plants was recorded. The results showed that Na 2 SO 4 ‐treated plants had a greater yield advantage than those exposed to NaCl‐treatments. The inclusion of CaSO 4 was beneficial to both salinity types and improved the yield potential. Similarly, smut susceptibility was reduced by 10.8% for the Na 2 SO 4 ‐stressed plants, compared with 22.7% for NaCl treatment. The comparable reductions in disease severity associated with Ca supply dropped to 33.0 and 17.0%, respectively, indicating the beneficial contribution of a Ca supply on the mediating disease reaction. Although the smut index was markedly decreased as the leaf C1 content increased in Ca‐deficient plants subjected to saline irrigation water without Ca supply, the increase in the Ca/Na ratio in plant tissue, associated with supplemental CaSO 4 application to each salinity type, appeared to have an additive effect on smut disease control and salt tolerance.