2026-04-17T17:17:52Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/3805942026-02-07T11:03:59Zcom_2072_1033col_2072_452950

00925njm 22002777a 4500 dc Roig Villanova, Irma author Martínez García, Jaime Francisco author 2022-09-21 In sun-loving plants, detection of the proximity of nearby competitors triggers a set of responses known as the shade avoidance syndrome (SAS). These responses will help the plant to acclimate to the proximity of vegetation that might compromise light availability and limit plant development. Plants sense the presence of nearby competitor vegetation as changes in the light quality, i.e. a reduced red (R) to far-red light (FR) ratio (R:FR). Among the various responses to neighboring plants, one of the best studied and characterized is the promotion of the hypocotyl elongation in seedlings of the model plant Arabidopsis thaliana, that might help them to outcompete neighboring seedlings and reach better light conditions. In addition to this and other developmental changes, shade-perception affects photosynthetic capacity and reduces plant defense. In this chapter, we will review the main molecular aspects that control the regulation of hypocotyl elongation, including the role of the phytochrome photoreceptors, that sense the signal, and the best known genetic and hormonal components that participate downstream shade perception. Because of the obvious interest for translating this knowledge to agriculture, we will also explore what is known about the molecular interaction between shade perception, defense responses and the growth-defense trade-off observed in high planting density. The authors are supported by grant PID2020-115782GB-I00 from Spanish MCIN/AEI (10.13039/501100011033), by the EU PRIMA project UToPIQ (MCIN/AEI code PCI2021-121941), the Generalitat Valenciana project ENIGmA (PROMETEU/2021/056), and the Consejo Superior de Investigaciones Cientificas (CSIC code 202040E256). Objectius de Desenvolupament Sostenible::12 - Producció i Consum Responsables Objectius de Desenvolupament Sostenible::12 - Producció i Consum Responsables::12.2 - Per a 2030, assolir la gestió sostenible i l’ús eficient dels recursos naturals Objectius de Desenvolupament Sostenible::15 - Vida d'Ecosistemes Terrestres Postprint (updated version) Àrees temàtiques de la UPC::Enginyeria agroalimentària::Agricultura::Producció vegetal Plants - Variation Arabidopsis thaliana Jasmonic acid (JA) Plant defense Plant development Plant proximity Shade avoidance Vegetation proximity Plantes--Variació Molecular regulation of plant responses to shade