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Abd El-Samad
HM
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Original Research Article The biotic role of natural biofertilizer application in improvement osmotic defense system of two wheat cultivars grown under osmotic stress |
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Hamdia, M. Abd El-Samad* and Mohamed, A. A. |
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1,2Botany and
Microbiology Department, Faculty of Science, Minia University,
El-Minia, Egypt |
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Abstract |
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The present work
was conducting to study the response strategy of salt tolerance
of cv. Sakha 94 and cv. Giza 168 and the biotic role of
fertilizer Azospirillum brasilense inoculation in
improvement osmotic defense system of these cultivars. It can be
observed that cv. Giza168 was the most tolerant one and cv.
Sakha 94 was the sensitive one. This sensitivity in cv. Sakha 94
was concomitant with the decrease in osmotic pressure of the
cell sap, soluble sugar and soluble protein, shoot K+ and Ca++
and root K+, water uptake, fresh, dry matter and length of shoot
and root of wheat plant. On the other side the tolerant of cv.
Giza in 168 was concomitant with the increase of osmotic
pressure, shoot soluble sugar, soluble protein, water content,
fresh, dry matter and length of both organs. Sodium increased in
shoot and root of both cultivars. Azospirillum
application was significantly increased in the production of
fresh, and dry matter length and water content of both cv. Sakha
94 and cv. Giza 168. Soluble sugar and soluble protein content
of both cultivars were markedly accumulated. Azospirrillum
application induced a marked decrease in the accumulation of Na+
content in shoot and root of both tested cultivars.
Azospirillum inoculation was significantly increased K+,
Ca++ and Mg++ with increasing osmotic stress in shoot and root
of cv. Sakha 94. In cv. Giza168, there are a similar trend
between shoot and root in the accumulation of K+ and Ca++,
increase with increasing osmotic stress. |
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