The effect of drought stress on proline accumulation, soluble carbohydrate amounts and ionic sodium and potassium content changes in different white bean (phaseolus vulgaris l.) genotype

Subject Areas : crop production

masud zade bageri ¹

1 - دانشگاه آزاد اسلامی، واحد شیراز، گروه علوم باغبانی، شیراز، ایران

Received: 2010-09-14 Accepted : 2011-07-11 Published : 2010-07-01

Keywords: proline, drought stress, soluble glucose, white bean, potassium and sodium ion,

Abstract :

To assess some of the physiological changes, an experiment in the form of split plots and complete randomized blocks was performed in three replications in the research fields of the Islamic Azad university of Shiraz. The firs factor was irrigation level (normal and drought stress) and the second factor included white bean genotypes, (Daneshkadeh shekoofa and G11867), which were categorized as sensitive, semi-tolerant and tolerant dehiscent based on morphological indices. Samples were taken in the 50% flowering stage and the amounts of soluble glucose, proline content, sodium and potassium were measured. The results of the experiment showed that the soluble solution density, proline content and potassium ion increased under stress and the amount of sodium ion decreased. The G11867 dehiscent genotype had the highest amount of soluble glucose and sodium ion. The Daneshkadeh sensitive genotype had the highest amount of potassium ion and proline content. The results indicated that the accumulation of excess potassium and proline content in beans under drought stress can create a kind of adaptation for the plant against drought and help production under these conditions.

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