Nitric oxide production occurs after cytosolic alkalinization during stomatal closure induced by abscisic acid.

@article{Gonugunta2008NitricOP,
  title={Nitric oxide production occurs after cytosolic alkalinization during stomatal closure induced by abscisic acid.},
  author={Vijay K. Gonugunta and Nupur Srivastava and Mallikarjuna Rao Puli and Agepati S. Raghavendra},
  journal={Plant, cell & environment},
  year={2008},
  volume={31 11},
  pages={1717-24}
}
Abscisic acid (ABA) raised the cytosolic pH and nitric oxide (NO) levels in guard cells while inducing stomatal closure in epidermis of Pisum sativum. Butyrate (a weak acid) reduced the cytosolic pH/NO production and prevented stomatal closure by ABA. Methylamine (a weak base) enhanced the cytosolic alkalinization and aggravated stomatal closure by ABA. The rise in guard cell pH because of ABA became noticeable after 6 min and peaked at 12 min, while NO production started at 9 min and peaked at… CONTINUE READING