Yara Mohammad Anwar Jan
Manarat Al-Riyadh School, Al-Riyadh, SAUDI ARABIA
Plants are the main source of carbon for humans; they absorb carbon dioxide (Co2) and release oxygen (O2) through stomata pores. In this research it was assumed that when the stomata are exposed to Abscisic acid (ABA) they will close and that the possibility of an interaction between ABA and Cyclic Guanosine-Monophosphate (cGMP) exists. This project investigated the stomatal aperture under four different conditions; Salt solution as a control, ABA as a positive control, cGMP and the combination of cGMP and ABA. The stomatal apertures under the four conditions were measured for four hours each. The experiment met the objective where it showed that the cGMP`s effect on the stomatal aperture alone was not significant; t(56)=0.119, p=0.906. The hypothesis was supported by finding a significant difference in the two conditions; t(56)=7.82. p=0 for the ABA condition, t(56)=13.239, p=0 for the combination of cGMP and ABA and cGMP was found to accelerate the effect of ABA on the stomatal aperture, t(58)=11.255, p=0. The results for the interaction between cGMP and ABA in this study will lead to the development of new genes and targets that can be manipulated using modern plant biotechnologies. In the future, engineering of new varieties of these plants will be introduced so that they can thrive even when affected by abiotic stresses, such as salinity and sodicity conditions.