Signal regulators of systemic acquired resistance.
Salicylic acid (SA) is an important phytohormone that plays a vital role in a number of physiological responses, including plant defense. The last two decades have witnessed a number of breakthroughs related to biosynthesis, transport, perception and signaling mediated by SA. These findings demonstrate that SA plays a crictical role in both local and systemic defense responses. Systemic acquired resistance (SAR) is one such SA-dependent response. SAR is a long distance signaling mechanism that provides broad spectrum and long-lasting resistance to secondary infections throughout the plant. This unique feature makes SAR a highly desirable trait in crop production. This review summarizes the recent advances in the role of SA in SAR and discusses its relationship to other SAR inducers.
Department of Plant Pathology, University of Kentucky Lexington, KY, USA.
Qing-Ming
QM
Gao
Department of Plant Pathology, University of Kentucky Lexington, KY, USA ; Department of Plant Biology and Ecology, College of Life Sciences, Nankai University Tianjin, China.
Shifeng
S
Zhu
Department of Plant Pathology, University of Kentucky Lexington, KY, USA.
Pradeep
P
Kachroo
Department of Plant Pathology, University of Kentucky Lexington, KY, USA.
Aardra
A
Kachroo
glycerol-3-phosphate; lipids; plant defense; reactive oxygen species; systemic resistance