Salicylic Acid Regulates Pollen Tip Growth through an NPR3/NPR4-Independent Pathway

Autor: Xuanming Liu, Duoyan Rong, Nan Luo, Zhenbiao Yang, Jean-Claude Mollet
Přispěvatelé: Hunan University [Changsha] (HNU), University of California [Riverside] (UCR), University of California, Laboratoire de Glycobiologie et Matrice Extracellulaire Végétale (Glyco-MEV), Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)
Rok vydání: 2016
Předmět:
0106 biological sciences
0301 basic medicine
[SDV.BIO]Life Sciences [q-bio]/Biotechnology
Arabidopsis
Pollen Tube
MeSA (methyl salicylic acid)
[SDV.BC.BC]Life Sciences [q-bio]/Cellular Biology/Subcellular Processes [q-bio.SC]
Plant Science
GTPase
01 natural sciences
chemistry.chemical_compound
[SDV.BC.IC]Life Sciences [q-bio]/Cellular Biology/Cell Behavior [q-bio.CB]
Cell polarity
[SDV.BDD.GAM]Life Sciences [q-bio]/Development Biology/Gametogenesis
biology
Esterases
[SDV.BBM.MN]Life Sciences [q-bio]/Biochemistry
Molecular Biology/Molecular Networks [q-bio.MN]
Cell biology
Protein Transport
CRIB4-GFP
Biochemistry
Pectins
Pollen tube
Signal transduction
Salicylic Acid
Signal Transduction
Endocytosis
Methylation
Article
03 medical and health sciences
GTP-Binding Proteins
[SDV.BBM.GTP]Life Sciences [q-bio]/Biochemistry
Molecular Biology/Genomics [q-bio.GN]
endocytosis
FM4-64
cardiovascular diseases
Tip growth
[SDV.BBM.BC]Life Sciences [q-bio]/Biochemistry
Molecular Biology/Biochemistry [q-bio.BM]
Molecular Biology
Arabidopsis Proteins
SA (salicylic acid)
nutritional and metabolic diseases
[SDV.BBM.BM]Life Sciences [q-bio]/Biochemistry
Molecular Biology/Molecular biology
Methyltransferases
biology.organism_classification
Clathrin
[SDV.BV.PEP]Life Sciences [q-bio]/Vegetal Biology/Phytopathology and phytopharmacy
[SDV.BV.AP]Life Sciences [q-bio]/Vegetal Biology/Plant breeding
[CHIM.POLY]Chemical Sciences/Polymers
030104 developmental biology
chemistry
ROP activity
Salicylic acid
010606 plant biology & botany
Zdroj: Molecular Plant
Molecular Plant, Cell Press/Oxford UP, 2016, 9 (11), pp.1478-1491. ⟨10.1016/j.molp.2016.07.010⟩
Mol Plant
ISSN: 1674-2052
1752-9867
DOI: 10.1016/j.molp.2016.07.010
Popis: International audience; Tip growth is a common strategy for the rapid elongation of cells to forage the environment and/or to target to long-distance destinations. In the model tip growth system of Arabidopsis pollen tubes, several small-molecule hormones regulate their elongation, but how these rapidly diffusing molecules control extremely localized growth remains mysterious. Here we show that the interconvertible salicylic acid (SA) and methylated SA (MeSA), well characterized for their roles in plant defense, oppositely regulate Arabidopsis pollen tip growth with SA being inhibitory and MeSA stimulatory. The effect of SA and MeSA was independent of known NPR3/NPR4 SA receptor-mediated signaling pathways. SA inhibited clathrin-mediated endocytosis in pollen tubes associated with an increased accumulation of less stretchable demethylated pectin in the apical wall, whereas MeSA did the opposite. Furthermore, SA and MeSA alter the apical activation of ROP1 GTPase, a key regulator of tip growth in pollen tubes, in an opposite manner. Interestingly, both MeSA methylesterase and SA methyltransferase, which catalyze the interconversion between SA and MeSA, are localized at the apical region of pollen tubes, indicating of the tip-localized production of SA and MeSA and consistent with their effects on the apical cellular activities. These findings suggest that local generation of a highly diffusible signal can regulate polarized cell growth, providing a novel mechanism of cell polarity control apart from the one involving protein and mRNA polarization.
Databáze: OpenAIRE
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