ارزیابی کاربرد کلرمکوات کلراید، سالیسیلیک اسید و جاسمونیک اسید بر رشد و عملکرد گندم در شرایط تنش خشکی

Drought is the most important factor that limiting wheat growth and yield. To examine the effect of
plant growth regulators (PGRS); chlormequat chloride (CCC), salicylic acid (SA) and jasmonic acid
(JA) on growth and yield of wheat (cv. Roshan) under different drought stress levels, a greenhouse
experiment was conducted in College of Agriculture, Shiraz University during 2012. This
experiment was carried out as completely randomized design with two factors, including PGR at
four levels; CCC(19 Mm), SA(1Mm), JA(0.1Mm) and water as control, drought stress at four
levels; non-stress as control, mild, moderate and severe drought stress. The results showed that
drought stress decreased stem and ear length, grain number per spike, biological yield, grain yield
and harvest index. Overall, the results indicated that although drought stress decreased wheat
growth and yield, PGRS could compensate some of these losses and chlormequat chloride foliar
application had the best effects on growth and yield of wheat.
Key words: drought stress, plant growth regulators, wheat, yield