A Review: Systemic Signaling in the Regulation of Plant Responses to Low N, P and Fe
Zhi Geng, Jun Chen, Bo Lü, Fuyuan Zhang, Ziping Chen, Yujun Liu, Chao Xia, Jing Huang, Cankui Zhang, Manrong Zha, Congshan Xu
Abstract
Plant signal transduction occurs in response to nutrient element deficiency in plant vascular tissue. Recent works have shown that the vascular tissue is a central regulator in plant growth and development by transporting both essential nutritional and long-distance signaling molecules between different parts of the plant's tissues. Split-root and grafting studies have deciphered the importance of plants' shoots in receiving root-derived nutrient starvation signals from the roots. This review assesses recent studies about vascular tissue, integrating local and systemic long-distance signal transduction and the physiological regulation center. A substantial number of studies have shown that the vascular tissue is a key component of root-derived signal transduction networks and is a regulative center involved in plant elementary nutritional deficiency, including nitrogen (N), phosphate (P), and iron (Fe).