High temperature limits in vivo pollen tube growth rates by altering diurnal carbohydrate balance in field-grown Gossypium hirsutum pistils

Snider, John L.; Oosterhuis, Derrick M.; Loka, Dimitra A.; Kawakami, Eduardo M.

doi:10.1016/j.jplph.2010.12.011

Cited by 73 publications

(55 citation statements)

References 41 publications

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“…Heat stress (Mittler, 2006;Mittler and Blumwald, 2010) is known to damage plant tissues (Pareek et al, 1997), interfere with plant reproductive development (Warrington, 1983;Francis and Barlow, 1988;Commuri and Jones, 2001;Matsui and Omasa, 2002;Sato et al, 2006;Barnabás et al, 2008;Snider et al, 2011), and cause the redistribution of native plant populations (Marchand et al, 2006;Walker et al, 2006;Darbah et al, 2010;Offord, 2011). Significant consequences of heat stress include reductions in crop yields, lower biomass production (Mittler, 2006;Qaderi et al, 2006;Sato et al, 2006;White et al, 2006;Barnabás et al, 2008;Mittler and Blumwald, 2010), and alterations to allelic frequencies in plant populations (Jump et al, 2006).…”

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confidence: 99%

Heat Reduces Nitric Oxide Production Required for Auxin-Mediated Gene Expression and Fate Determination in Tree Tobacco Guard Cell Protoplasts

et al. 2012

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Tree tobacco (Nicotiana glauca) is an equatorial perennial with a high basal thermotolerance. Cultured tree tobacco guard cell protoplasts (GCPs) are useful for studying the effects of heat stress on fate-determining hormonal signaling. At lower temperatures (32°C or less), exogenous auxin (1-naphthalene acetic acid) and cytokinin (6-benzylaminopurine) cause GCPs to expand 20-to 30-fold, regenerate cell walls, dedifferentiate, reenter the cell cycle, and divide. At higher temperatures (34°C or greater), GCPs expand only 5-to 6-fold; they do not regenerate walls, dedifferentiate, reenter the cell cycle, or divide. Heat (38°C) suppresses activation of the BA auxin-responsive transgene promoter in tree tobacco GCPs, suggesting that inhibition of cell expansion and cell cycle reentry at high temperatures is due to suppressed auxin signaling. Nitric oxide (NO) has been implicated in auxin signaling in other plant systems. Here, we show that heat inhibits NO accumulation by GCPs and that L-N G -monomethyl arginine, an inhibitor of NO production in animals and plants, mimics the effects of heat by limiting cell expansion and preventing cell wall regeneration; inhibiting cell cycle reentry, dedifferentiation, and cell division; and suppressing activation of the BA auxin-responsive promoter. We also show that heat and L-N G -monomethyl arginine reduce the mitotic indices of primary root meristems and inhibit lateral root elongation similarly. These data link reduced NO levels to suppressed auxin signaling in heat-stressed cells and seedlings of thermotolerant plants and suggest that even plants that have evolved to withstand sustained high temperatures may still be negatively impacted by heat stress.The three major interrelated abiotic plant stresses accompanying global climate change are increasing concentrations of atmospheric CO 2 , heat, and drought (Mittler,

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confidence: 99%

Heat Reduces Nitric Oxide Production Required for Auxin-Mediated Gene Expression and Fate Determination in Tree Tobacco Guard Cell Protoplasts

et al. 2012

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“…It has been demonstrated that moderate temperature increases could strongly influence pollen development. 54 Results of the present study could be the foundation for production of crops with highly stress-tolerant pollen, which could have an impact on productivity in a scenario of increasing temperatures, such as those projected to result from global climate change. In addition, pollen-specific promoters have the potential to target genes of biotechnological interest in pollen grains.…”

Section: Articlementioning

confidence: 87%

Characterization of a Pollen-Specific and Desiccation-Associated AP2/ERF Type Transcription Factor Gene from Castor Bean (Ricinus communis L.)

Cipriano

Morais

Aragão

2013

IJPB

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DREB transcription factors (TF) belong to the superfamily of AP2/ERF and their involvement in protein-protein interactions and DNA binding has been proposed. AP2/ERF proteins have important functions in the transcriptional regulation of a variety of biological processes related to growth and development, as well as various responses to environmental stimuli, regulating expression of plant biotic and abiotic stress-responsive genes. In this study an AP2/ERF TF gene (named RcDREB1) was isolated from castor bean (Ricinus communis L.) and its expression was analyzed in developing seeds, leaves, ovules, stems and petals of plants cultivated under field conditions. Transcripts were only observed in pollen grains, peaking during anthesis. The RcDREB1 deduced amino acid sequence was compared to other AP2/ERF TF proteins and presented 38-78% identity. Phylogenetic analysis classified it as a member of the CBF/DREB subfamily, rooting with the subgroup A-5. The RcDREB1 promoter was fused to the gus reporter gene and used to transform tobacco. Transgenic plants were exposed to various abiotic stress treatments (low and high tempera- tures, drought, salinity and exogenous ABA) and no detectable GUS expression was observed, suggesting that the RcDREB1 promoter is not active under tested conditions. In silico analyses revealed the presence of three copies of the regulatory late pollen-specific element (AGAAA) in the RcDREB1 5 ́-region. Interestingly, GUS expression was only observed in pollen grains, starting when the flower opened and initiating the senescence process; at this point, desiccated mature pollen grains are released from anthers. In addition, dehydrated developing pollen grains also expressed the gus gene. This is the first study on a DREB gene presenting pollen-specific expression

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“…44 However, under field conditions and much more moderate high temperature exposure (T max = 34.6°C), diurnal pollen tube growth rates were significantly slowed in G. hirsutum pistils 11 without any alterations in oxidative stress and ATP content of the pistil or source leaf photosynthesis. 45 In contrast, high temperature significantly decreased soluble carbohydrate supply in the pistil during pollen tube growth through the style and pollen tube growth rates were highly correlated with the soluble carbohydrate content of the pistil during pollen tube growth (Fig. 2).…”

Section: In Vivo Pollen-pistil Interactions Under Heat Stressmentioning

confidence: 94%

“…2). 45 It is well established that pollen tube growth transitions from an autotrophic growth phase (utilizing carbohydrate reserves preexisting within the pollen grain at the time of anthesis) to a heterotrophic growth phase (utilizing carbohydrate reserves within the transmitting tissue of the style). 3,33 Given that the energy requirements of actively growing pollen tubes are approximately 10-fold higher than those of vegetative tissues, 46 it is to be expected that heat-induced declines in pistil carbohydrate supply should have a pronounced affect on in vivo pollen tube growth.…”

Section: In Vivo Pollen-pistil Interactions Under Heat Stressmentioning

confidence: 99%

How does timing, duration, and severity of heat stress influence pollen-pistil interactions in angiosperms?

Snider

Oosterhuis

2011

Plant Signaling & Behavior

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High temperature limits in vivo pollen tube growth rates by altering diurnal carbohydrate balance in field-grown Gossypium hirsutum pistils

Cited by 73 publications

References 41 publications

Heat Reduces Nitric Oxide Production Required for Auxin-Mediated Gene Expression and Fate Determination in Tree Tobacco Guard Cell Protoplasts

Heat Reduces Nitric Oxide Production Required for Auxin-Mediated Gene Expression and Fate Determination in Tree Tobacco Guard Cell Protoplasts

Characterization of a Pollen-Specific and Desiccation-Associated AP2/ERF Type Transcription Factor Gene from Castor Bean (Ricinus communis L.)

How does timing, duration, and severity of heat stress influence pollen-pistil interactions in angiosperms?

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