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SM ISO690:2012 GOJINEŢCHI, Ortanţa, ROTARU, Vladimir, BUDAC, Alexandru, CORDUNEANU, Petru. Modificări induse de stresul hidric, nutriţia minerală cu fosfor şi fier în conţinutul de glucide şi aminoacizi liberi în plantele de soia
. In: Studia Universitatis Moldaviae (Seria Ştiinţe Reale şi ale Naturii), 2008, nr. 2(12), pp. 81-85. ISSN 1814-3237. |
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Studia Universitatis Moldaviae (Seria Ştiinţe Reale şi ale Naturii) | ||||||
Numărul 2(12) / 2008 / ISSN 1814-3237 /ISSNe 1857-498X | ||||||
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Pag. 81-85 | ||||||
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An pot soil (cernoziom carbonated) culture experiment was conducted to determine the modification in carbohydrates
and free amino acids content in soybean (cv. Zodiac) leaves in relation to phosphorus and iron nutrition under water
stress conditions. Soybean plants were exposed to drought for 14 days during flowering stage of development and the
samples were collected after stress period.
The P-sufficient supply decreased the content of nonstructural carbohydrates (sucrose and hexose sugars) in leaves.
This result was due to translocation of carbohydrates in sinks organs of roots and nodules. Iron supplemental nutrition
with phosphorus fertilizer stimulated the accumulation of the level of free amino acids and soluble sugars irrespective of
the level of soil moisture. Water shortage induced accumulation level of free amino acids in leaves. The both application
phosphorus and iron increased the synthesis of amino acids in inoculated as well as in non-inoculated soybean plants.
Hence the experimental data further emphasize the physiological importance of adequate nutrition with phosphorus and
iron to attenuate the drought impact on plant metabolism and productivity. |
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