PJB-2019-674
MITIGATION OF THE SALINITY INFLUENCES ON MAIZE (ZEA MAYS L.) PRODUCTIVITY BY EXOGENOUS APPLICATIONS OF GLYCINE BETAINE
ABEER HAMDY ELHAKEM
Abstract
A field experiment was carried out to estimate the advantageous efficiency of the foliar application of glycine betaine (GB) (10mM) on salt-stressed maize (Zea mays L.) plants. Salinity treatments (50 and 100 mM) were conducted using sodium chloride (NaCl). The results showed that the increase in salinity levels led to a decrease in the maize shoot growth criteria (shoot dry weight, plant height at maturity, ear height above ground, leaf area index and number of leaves per plant at maturity) and yield components (ear length, ear diameter, number of kernels per ear, 100 seed weight and grain weight per ear). This effect was obvious with the 100 mM NaCl treatment for all measured parameters. On the other hand, the exogenous application of glycine betaine seemed to mitigate the negative effects of salt stress on the growth criteria and productivity of maize plants. So, it can be concluded that maize plants are not salt-tolerant and the foliar application of GB might be useful as a possible growth regulator to ameliorate the growth and productivity of maize plants under salinity conditions.
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