2019
DOI: 10.1105/tpc.18.00907
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PRX9 and PRX40 Are Extensin Peroxidases Essential for Maintaining Tapetum and Microspore Cell Wall Integrity during Arabidopsis Anther Development

Abstract: Pollen and microspore development are essential steps in the life cycle of all land plants that generate male gametes. Within flowering plants, pollen development occurs inside of the anther. Here, we report the identification of two class III peroxidase-encoding genes, PEROXIDASE9 (PRX9) and PRX40, that are genetically redundant and essential for proper anther and pollen development in Arabidopsis (Arabidopsis thaliana). Arabidopsis double mutants devoid of functional PRX9 and PRX40 are male sterile. The muta… Show more

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Cited by 67 publications
(57 citation statements)
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“…Crosslinking occurs through the formation of intra‐ or inter‐molecular covalent bonds between two tyrosine residues and is catalyzed by peroxidases. Two Arabidopsis peroxidases, PEROXIDASE9 (PRX9) and PRX40, function redundantly to maintain CWI in the tapetum by crosslinking extensins during anther development (Jacobowitz et al ., ). But because the tapetum is a reproductive cell layer with specialized wall composition, it remains to be seen whether this finding is transferable to vegetative tissues that undergo diffuse growth.…”
Section: Cell Wall Integrity Sensingmentioning
confidence: 97%
“…Crosslinking occurs through the formation of intra‐ or inter‐molecular covalent bonds between two tyrosine residues and is catalyzed by peroxidases. Two Arabidopsis peroxidases, PEROXIDASE9 (PRX9) and PRX40, function redundantly to maintain CWI in the tapetum by crosslinking extensins during anther development (Jacobowitz et al ., ). But because the tapetum is a reproductive cell layer with specialized wall composition, it remains to be seen whether this finding is transferable to vegetative tissues that undergo diffuse growth.…”
Section: Cell Wall Integrity Sensingmentioning
confidence: 97%
“…PRX9 and PRX40 were confirmed to be H 2 O 2 -dependent peroxidases that are capable of crosslinking extensins in the cell wall. prx9prx40 double mutants displayed tapetum hypertrophy and pollen degeneration consistent with a lack of extensin cross-linking and compromised cell wall integrity (Jacobowitz et al, 2019). There are several members of class III peroxidases which are expressed in pollen (Table 1), suggesting a possible role for this gene family in pollen development by modulation of ROS levels.…”
Section: Ros In Male Gametophyte Developmentmentioning
confidence: 98%
“…Peroxidases have been implicated in diverse aspects of plant development and response to the environment, often involving cell wall modifications (Shigeto and Tsutsumi, 2016). In Arabidopsis, two class III peroxidase-encoding genes, PEROXIDASE9 (PRX9) and PRX40 are required for maintaining tapetum and microspore cell wall integrity during anther development in Arabidopsis (Jacobowitz et al, 2019). PRX9 and PRX40 were confirmed to be H 2 O 2 -dependent peroxidases that are capable of crosslinking extensins in the cell wall.…”
Section: Ros In Male Gametophyte Developmentmentioning
confidence: 99%
“…However, at later stages of anther development, MADS3 regulates ROS homeostasis, and abnormal expression of MADS3 causes the accumulation of O2- and pollen sterility (Hu et al, 2011). PEROXIDASE9 and PEROXIDASE40, which catalyze the oxidation of various substrates by H 2 O 2 , are genetically redundant and essential for proper anther and pollen development in Arabidopsis , likely through their extensin cross-linking activity (Jacobowitz et al, 2019). OsCIPK31 perceives the response to stresses and regulates ROS accumulation and IAA distribution in the panicle.…”
Section: Roles Of Ros In Plant Growth and Developmentmentioning
confidence: 99%