Arabidopsis lipocalins AtCHL and AtTIL have distinct but overlapping functions essential for lipid protection and seed longevity

• DOI: 10.1111/pce.12159
• Publication Date: 2013-07-10T09:43:54Z
• Authors: SIMONA BOCA; FLEUR KOESTLER; BRIGITTE KSAS; ANNE CHEVALIER; JULIETTE LEYMARIE; AGNES FEKETE; MARTIN J. MUELLER; MICHEL HAVAUX
• Keywords: 0301 basic medicine; Hot Temperature; Light; Arabidopsis Proteins; Arabidopsis; lipid peroxidation; Lipocalins; Droughts; Oxidative Stress; 03 medical and health sciences; Stress, Physiological; [SDV.BDD] Life Sciences [q-bio]/Development Biology; Seeds; lipidomics; oxidative stress; Lipid Peroxidation; [SDV.BDD]Life Sciences [q-bio]/Development Biology

Lipocalins are a group of multifunctional proteins, recognized as carriers small lipophilic molecules, which have been characterized in bacteria and animals. Two true lipocalins recently identified plants, the temperature-induced lipocalin (TIL) chloroplastic (CHL), expression is induced by various abiotic stresses. Each appeared to be specialized responses specific stress conditions Arabidopsis thaliana, with AtTIL AtCHL playing protective role against heat high light, respectively. The double mutant KO × deficient both was more sensitive temperature, drought light stresses than single mutants, exhibiting intense lipid peroxidation. deficiency dramatically enhanced photosensitivity mutants (vte1, npq1) affected protection mechanisms (tocopherols, zeaxanthin), confirming prevention Seeds were very natural artificial ageing, again this phenomenon associated oxidation polyunsaturated lipids. presented results show that overlapping functions essential for resistance survival.