Effects of Salicylic Acid and Cut off Irrigation on Some Physiological Characteristics of Sweet Corn

Hassan fani mayani; Jafar Masoud Sinaki; Ghanbar laei

Volume : IV, Issue : VIII, August - 2014

Effects of Salicylic Acid and Cut off Irrigation on Some Physiological Characteristics of Sweet Corn

Hassan Fani Mayani, Jafar Masoud Sinaki, Ghanbar Laei

Abstract :

An experiment in the split–split plot arrangement using the randomized complete block design with three replications was carried out in Damghan (Semnan Province) in the crop year 2012–2013 to study the effects of spraying Salicylic acid and cessation irrigation conditions and also the mutual effects of these two factors on Chlorophylls a and b, total Carotenoid, leaf surface area and proteins of two corn cultivars. The major factor was the stress resulting from cessation of irrigation at three levels (the control, BBCH51 and BBCH61), the minor factor consised of three levels of Salicylic acid (control, 100 and 200 ppm) and the sub–minor factor was two corn cultivars namely Chase and Sweet Corn. The results of ANOVA showed that the highest percentage of protein (20.24%) was achieved in the interactions of Chase cultivar, irrigation cessation at the control stage and Salicylic acid application (200 ppm). The mutual effects of Salicylic acid and irrigation cessation on leaf surface area, carotenoid content and Chlorophyll a, caused significant differences at the 5% level of probability. Effect of only irrigation cessation on Chlorophyll b caused significant differences at the one percent level of probability and raised its quantity to 0.086 milligram per gram fresh weight (mgg–1fw). Moreover, the maximum total Chlorophyll content of 0.349 mgg–1fw was observed in the interactions of Chase cultivar, irrigation cessation and using Salicylic acid (200 ppm). Therefore, we conclude that the effects of Salicylic acid on improving growth and on increasing yield were tangible under stress and under normal conditions and significantly improved the evaluated characteristics. Also both concentrations of Salicylic acid especially those of 200 ppm, played a role in relieving the stress caused by irrigation cessation.