The Plant Cuticle Is Required for Osmotic Stress Regulation of Abscisic Acid Biosynthesis and Osmotic Stress Tolerance in<i>Arabidopsis</i>

Wang, Zhenyu; Xiong, Liming; Li, Wenbo; Zhu, Jian‐Kang; Zhu, Jianhua

doi:10.1105/tpc.110.081943

Cited by 163 publications

(132 citation statements)

References 76 publications

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“…In addition to the direct effects of epidermal traits on water balance, the permeability of the cuticle has also been shown to affect stress defenses through influencing the hormonal response. Wang et al (2011) has reported that osmotic stress-induced ABA biosynthesis and osmotic stress tolerance were impaired in cutin mutants of Arabidopsis. This implies the possibility that the thin and permeable cuticle of Cappelle Desprez and the low level of stress defense in this cultivar (see below) are not just parallel traits formed during evolution, but might also have a functional connection.…”

Section: Discussionmentioning

confidence: 99%

A morpho-physiological approach differentiates bread wheat cultivars of contrasting tolerance under cyclic water stress

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Eitel

et al. 2014

Journal of Plant Physiology

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Leaf micromorphological traits and some physiological parameters with potential relevance to drought tolerance mechanisms were investigated in four selected winter wheat varieties. Plants were subjected to two cycles of drought treatment at anthesis. Yield components confirmed contrasting drought-sensitive and -tolerant behavior of the genotypes. Drought tolerance was associated with small flag leaf surfaces and less frequent occurrence of stomata. Substantial variation of leaf cuticular thickness was found among the cultivars. Thin cuticle coincided with drought sensitivity and correlated with a high rate of darkadapted water loss from leaves. Unlike in Arabidopsis, thickening of the cuticular matrix in response to water deprivation did not occur. Water stress induced epicuticular wax crystal depositions preferentially on the abaxial leaf surfaces. According to microscopy and electrolyte leakage measurements from leaf tissues, membrane integrity was lost earlier or to a higher extent in sensitive than in tolerant genotypes. Cellular damage and a decline of relative water content of leaves in sensitive cultivars became distinctive during the second cycle of water deprivation. Our results indicate strong variation of traits with potential contribution to the complex phenotype of drought tolerance in wheat genotypes. The maintained membrane integrity and relative water content values during repeated water limited periods were found to correlate with drought tolerance in the selection of cultivars investigated.

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Section: Discussionmentioning

confidence: 99%

A morpho-physiological approach differentiates bread wheat cultivars of contrasting tolerance under cyclic water stress

Jäger

Fábián

Eitel

et al. 2014

Journal of Plant Physiology

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“…The outer layer of the cutin is covered with cuticular wax, a complex of C 20 to C 60 aliphatics, aldehydes, ketones, and wax esters, coating the outermost surface of the plant body (Pollard et al, 2008). A series of Arabidopsis mutants defective in cuticle synthesis and secretion show the biological roles of cuticles as a barrier to biotic or abiotic stresses, osmotic stress, water loss, and damage from UV radiation, and in preventing the fusion of leaves and floral organs (Yephremov et al, 1999;Pruitt et al, 2000;Krolikowski et al, 2003;Aharoni et al, 2004;Kurdyukov et al, 2006;Bessire et al, 2007;Shi et al, 2011;Wang et al, 2011). Some mutants are known to be involved in petal morphogenesis: Lack of nanoridges of petals, due to a mutation in DEFECTIVE IN CUTICULAR RIDGES (DCR, encoding a BAHD acyltransferase), CYP77A6 (cytochrome P450 family), GLYCEROL-3-PHOSPHATE ACYLTRANSFERASE6 (GPAT6), or PERMEABLE CUTICLE1 (PEC1), result in increased permeability of petals to a dye and cause organ fusion (Li-Beisson et al, 2009;Panikashvili et al, 2009;Bessire et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

Physical Interaction of Floral Organs Controls Petal Morphogenesis in Arabidopsis

et al. 2013

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Flowering plants bear beautiful flowers to attract pollinators. Petals are the most variable organs in flowering plants, with their color, fragrance, and shape. In Arabidopsis (Arabidopsis thaliana), petal primordia arise at a similar time to stamen primordia and elongate at later stages through the narrow space between anthers and sepals. Although many of the genes involved in regulating petal identity and primordia growth are known, the molecular mechanism for the later elongation process remains unknown. We found a mutant, folded petals1 (fop1), in which normal petal development is inhibited during their growth through the narrow space between sepals and anthers, resulting in formation of folded petals at maturation. During elongation, the fop1 petals contact the sepal surface at several sites. The conical-shaped petal epidermal cells are flattened in the fop1 mutant, as if they had been pressed from the top. Surgical or genetic removal of sepals in young buds restores the regular growth of petals, suggesting that narrow space within a bud is the cause of petal folding in the fop1 mutant. FOP1 encodes a member of the bifunctional wax ester synthase/diacylglycerol acyltransferase family, WSD11, which is expressed in elongating petals and localized to the plasma membrane. These results suggest that the FOP1/WSD11 products synthesized in the petal epidermis may act as a lubricant, enabling uninhibited growth of the petals as they extend between the sepals and the anthers.

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“…Several recent reports indicate that the relationship between ABA and cutin is complex, and ABA biosynthesis and signaling are impaired in mutants with disrupted cutin biosynthesis, suggesting that cutin components may be involved in mediating osmotic stress signaling (Wang et al, 2011). In addition, the transcription factor NF-X LIKE2, which binds to the promoters of a cutin-related gene and a transcription factor regulating cutin formation (Lisso et al, 2012), suppresses ABA accumulation and ABA responses, possibly to avoid osmotic stress response under normal conditions (Lisso et al, 2011).…”

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Cuticle Biosynthesis in Tomato Leaves Is Developmentally Regulated by Abscisic Acid

et al. 2017

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The expansion of aerial organs in plants is coupled with the synthesis and deposition of a hydrophobic cuticle, composed of cutin and waxes, which is critically important in limiting water loss. While the abiotic stress-related hormone abscisic acid (ABA) is known to up-regulate wax accumulation in response to drought, the hormonal regulation of cuticle biosynthesis during organ ontogeny is poorly understood. To address the hypothesis that ABA also mediates cuticle formation during organ development, we assessed the effect of ABA deficiency on cuticle formation in three ABA biosynthesis-impaired tomato mutants. The mutant leaf cuticles were thinner, had structural abnormalities, and had a substantial reduction in levels of cutin. ABA deficiency also consistently resulted in differences in the composition of leaf cutin and cuticular waxes. Exogenous application of ABA partially rescued these phenotypes, confirming that they were a consequence of reduced ABA levels. The ABA mutants also showed reduced expression of genes involved in cutin or wax formation. This difference was again countered by exogenous ABA, further indicating regulation of cuticle biosynthesis by ABA. The fruit cuticles were affected differently by the ABA-associated mutations, but in general were thicker. However, no structural abnormalities were observed, and the cutin and wax compositions were less affected than in leaf cuticles, suggesting that ABA action influences cuticle formation in an organdependent manner. These results suggest dual roles for ABA in regulating leaf cuticle formation: one that is fundamentally associated with leaf expansion, independent of abiotic stress, and another that is drought induced.

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The Plant Cuticle Is Required for Osmotic Stress Regulation of Abscisic Acid Biosynthesis and Osmotic Stress Tolerance inArabidopsis

Cited by 163 publications

References 76 publications

A morpho-physiological approach differentiates bread wheat cultivars of contrasting tolerance under cyclic water stress

A morpho-physiological approach differentiates bread wheat cultivars of contrasting tolerance under cyclic water stress

Physical Interaction of Floral Organs Controls Petal Morphogenesis in Arabidopsis

Cuticle Biosynthesis in Tomato Leaves Is Developmentally Regulated by Abscisic Acid

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