| |
Phytomorphology 71 (3&4) 2021, 101-110 101
Cryptic Roles of Nitric Oxide, a Key Mediator of Salicylic Acid and Jasmonic Acid Signalling under Abiotic Stress in Plants
Safoora Mariyam and Chandra Shekhar Seth*
Department of Botany, University of Delhi, Delhi-110007, India
ABSTRACT
Nitric oxide (NO) is a multitasking, gaseous reactive molecule; it is implicated in signalling responses of plants to biotic and abiotic factors, and increasingly known for interactions with several stress alleviators. It has been studied extensively in animals due to its role as a neurotransmitter. Given its recently discovered activities in plants, NO has great possibilities in inflecting plant stress responses and prompting signalling molecules against stressful conditions. It is known for its multifaceted responses in stress alleviation which comprises plant growth regulation, germination of seed, wound suppression, and other defensive responses. The functional interactions of NO among different stress signaling cascades lead to enhancement in the expression of genes that regulate biosynthesis of phytohormones. It interacts with auxin (AUX), gibberellin (GA), abscissic acid (ABA), jasmonic acid (JA), salicylic acid (SA) and results in powerful responses under stress. This review article focuses on the SA-NO-JA interactions and how their interactions trigger the re-programming of stress-responsive gene(s) expression.
Key words: C-repeat binding factor, heat shock response, pathogenesis-related genes, programmed cell death, sodium nitroprusside, systemic acquired resistance
*Author for correspondence: Chandra Shekhar Seth; e-mail: csseth52@gmail.com
|
|
