اثرﻣﺤﻠﻮلﭘﺎﺷﻲ روی و ﺑﻮر ﺑﺮ ﺑﺮﺧﻲ ﺻﻔﺎت ﻓﻴﺰﻳﻮﻟﻮژﻳﻚ ﻛﻨﺠﺪ (Sesamum indicum L) ﺗﺤﺖ ﺗﻨﺶ ﺧﺸﻜﻲ

In order to study the effect of foliar application of zinc and boron on the accumulationof leaf proline, soluble sugars, relative water content, and SPAD of sesame under different level of irrigation, an experiment was conducted as spilt plot in a randomized complete block design with three replications in 2013 at Fars research center for agriculture and natural resources. Main factor was including of three levels of drought stress as irrigation (irrigation after 75, 110 and 145 mm evaporation from class A evaporation pan) and sub factor was including of four levels of foliar applications (water, zinc sulfate, boric acid, and combined of zinc and boric acid). Results showed that increasing irrigation level significantly increased leaf soluble sugar, while decreased relative water content. Spraying boric acid had a significant effect on leaf proline and proline increased compared to the other foliar treatments, While boric acid significantly reduced soluble sugars. The foliar application of zinc and boric acid cause to obtain the highest relative water content in leaves compared to control. Foliar application of zinc, boron and combined of them significantly increased SPAD in comparison to control.