The effect of GA3 on germination and growth of two chickpea varieties i.e. C44 and Paidar 91 under different levels of NaCl salinity was studied. A gradual reduction in germination percentage plumule and radicle length and fresh and dry weights of plumule and radicle was observed under salt stress. GA3 treatment increased germination percentage under salt stress. It also improved fresh and dry weights of plumule and radicle along with an increase in their lengths. Significant results were obtained for all growth parameters except number of branches. Plant height and fresh and dry weight of shoot decreased under salinity stress. Application of 20 mg -1 1 gibberellic acid compensated this adverse effect of salinity. The efficiency of gibberellic acid to mitigate the effect of salinity reduced with rise in salinity level.
Data provided are for informational purposes only. Although carefully collected, accuracy cannot be guaranteed. The impact factor represents a rough estimation of the journal's impact factor and does not reflect the actual current impact factor. Publisher conditions are provided by RoMEO. Differing provisions from the publisher's actual policy or licence agreement may be applicable.
[Show abstract][Hide abstract] ABSTRACT: The response of six sugar beet genotypes (Raspoly, Nada, Strube, Almaz, Toro, Oskarpoly) under seven salinity levels (distilled water as control, 1500, 3000, 45000, 6000, 7500 and 9000 ppm NaCl) and soaking in gibberellic acid levels were studied on germination parameters. An experiment with factorial arrangement was conducted by using randomize complete block design with four replications. Seed soaking in GA3 significantly affected final germination percentage (FGP), mean germination time (MGT), coefficient velocity (CV), seedling vigor index (SVI), energy of germination (EG), emergence rate (ER) and speed of germination (SG). Highest averages of FGP, CV, SVI, EG, ER and SG, were produced from soaking seed in 200 ppm of GA3. Moreover, highest averages of MGT were recorded from soaking sugar beet seed in the control treatment. Sugar beet cultivars significantly differed in FGP, MGT, CV, SVI, EG, ER and SG. Highest averages of FGP, MGT, CV, SVI, EG, ER and SG were recorded with sown Raspoly cultivar. Increasing salinity concentrations from 0 to 9,000 ppm significantly decreased FGP, CV, SVI, EG, ER and SG. While, MGT increased with increasing salinity concentrations. Results of means comparison showed that in all genotypes, there was a decrease in germination percentage due to salinity stress increment and maximum germination percentage was delayed. The interaction between cultivars and seed soaking in GA3 levels significantly affected FGP, MGT, CV and SVI. The interaction between seed soaking in GA3 levels and salinity concentrations significantly affected FGP, MGT and SVI.