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

Snider, John L.; Oosterhuis, Derrick M.

doi:10.4161/psb.6.7.15315

Cited by 62 publications

(49 citation statements)

References 49 publications

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“…This was coincident with the idea that the reproductive growth of plant is more sensitive to the heat stress than the vegetative growth (Snider and Oosterhuis, 2011). However, the CaHsfA2 expression level in the flower of the thermotolerant line R9 was much higher than that in the leaves.…”

Section: Discussionmentioning

confidence: 78%

Cloning and expression analysis of heat-shock transcription factor gene CaHsfA2 from pepper (Capsicum annuum L.)

Guo¹,

Yin²,

Ji³

et al. 2014

Genet. Mol. Res.

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ABSTRACT. The heat-shock transcription factor (Hsf) gene CaHsfA2 (GenBank accession No. JX402923) was cloned from the Capsicum annuum thermotolerant line R9 by combining the techniques electron cloning and rapid amplification of cDNA ends. The gene, which is 1436 bp in length, had an open reading frame of 1089 bp that encoded 362 amino acids. There was an 831-bp intron between positions 321 and 322 of the cDNA. The deduced amino acid sequence of CaHsfA2 contained the conserved domains of Hsf, including DNA binding domain, adjacent domain with heptad hydrophobic repeats (A/B), activator motifs, nuclear localization signal, and nuclear export signal, and it had the highest E value of hypothesized annotation of HsfA2. CaHsfA2 had the nearest phylogenetic relationship with HsfA2 from Lycopersicon peruvianum and Mimulus guttatus, which was consistent with its botanical classification. After heat-shock treatment at 40°C for 2 h, the expression of CaHsfA2 was observed in different tissues of thermotolerant cultivar R9 and thermosensitive line B6; however, the expression levels of the CaHsfA2 gene were significantly different as follows: expression in B6 leaf > stem > flower > root, and expression in R9 flower > leaf > stem ≈ root.

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Section: Discussionmentioning

confidence: 78%

Cloning and expression analysis of heat-shock transcription factor gene CaHsfA2 from pepper (Capsicum annuum L.)

Guo¹,

Yin²,

Ji³

et al. 2014

Genet. Mol. Res.

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“…It has been reported that abiotic stresses can reduce the number and the size of floral organs and cause flower deformity or sterility due to altered expression of genes involved in flower morphogenesis (Smith & Zhao, ; Zinn et al., ). Sterility is induced by abiotic stresses mostly in male floral organ development (Barnabás et al., ; Hedhly, ; Smith & Zhao, ; Snider & Oosterhuis, ; Zinn et al., ). We observed increasing pollen grain abnormalities with temperature rise and water stress, decreasing the number of mature pollen grains.…”

Section: Discussionmentioning

confidence: 99%

“…Temperature rise and water stress seem to have less effect on sugar concentration (Carroll et al., ; Mu et al., ). They affect also pollen development and viability, which could perturb fertilization and seed development (Barnabás et al., ; Hedhly, ; Snider & Oosterhuis, ). Such modifications in pollen production mainly involve the following: (1) a reduction in the numbers of mature pollen grains; (2) abnormal pollen development, leading to decreased viability and germination capacity; and (3) abnormal anther morphology, leading to reduced pollen transfer (Bishop, Potts, & Jones, ; Devasirvatham et al., ; Hedhly, ; Sage et al., ).…”

Section: Introductionmentioning

confidence: 99%

Temperature and water stress affect plant–pollinator interactions in Borago officinalis (Boraginaceae)

Descamps

Quinet

Baijot

et al. 2018

Ecology and Evolution

116

127

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Climate change alters the abiotic constraints faced by plants, including increasing temperature and water stress. These changes may affect flower development and production of flower rewards, thus altering plant–pollinator interactions. Here, we investigated the consequences of increased temperature and water stress on plant growth, floral biology, flower‐reward production, and insect visitation of a widespread bee‐visited species, Borago officinalis. Plants were grown for 5 weeks under three temperature regimes (21, 24, and 27°C) and two watering regimes (well‐watered and water‐stressed). Plant growth was more affected by temperature rise than water stress, and the reproductive growth was affected by both stresses. Vegetative traits were stimulated at 24°C, but impaired at 27°C. Flower development was mainly affected by water stress, which decreased flower number (15 ± 2 flowers/plant in well‐watered plants vs. 8 ± 1 flowers/plant under water stress). Flowers had a reduced corolla surface under temperature rise and water stress (3.8 ± 0.5 cm2 in well‐watered plants at 21°C vs. 2.2 ± 0.1 cm2 in water‐stressed plants at 27°C). Both constraints reduced flower‐reward production. Nectar sugar content decreased from 3.9 ± 0.3 mg/flower in the well‐watered plants at 21°C to 1.3 ± 0.4 mg/flower in the water‐stressed plants at 27°C. Total pollen quantity was not affected, but pollen viability decreased from 79 ± 4% in the well‐watered plants at 21°C to 25 ± 9% in the water‐stressed plants at 27°C. Flowers in the well‐watered plants at 21°C received at least twice as many bumblebee visits compared with the other treatments. In conclusion, floral modifications induced by abiotic stresses related to climate change affect insect behavior and alter plant–pollinator interactions.

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“…Another reason for this might be that heat stress can also limit pollen germination through loss of stigmatic receptivity or a decrease in pistil nutrient supply to the growing pollen tube (Herrero and Hormaza 1996;Hedhly et al 2005). It is important to consider that pollen development is not the only sensitive process and that high temperatures can simultaneously impact male and female reproductive tissues, resulting in a synergistic effect on reproductive output (Snider and Oosterhuis 2011).…”

Section: Pollen Thermotolerance In Tomato (Solanum Lycopersicum)mentioning

confidence: 99%

Heat stress regimes for the investigation of pollen thermotolerance in crop plants

Iannacone²,

et al. 2016

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Pollen thermotolerance. Global warming is predicted to increase the frequency and severity of extreme weather phenomena such as heat waves thereby posing a major threat for crop productivity and food security. The yield in case of most crop species is dependent on the success of reproductive development. Pollen development has been shown to be highly sensitive to elevated temperatures while the development of the female gametophyte as well as sporophytic tissues might also be disturbed under mild or severe heat stress conditions. Therefore, assessing pollen thermotolerance is currently of high interest for geneticists, plant biologists and breeders. A key aspect in pollen thermotolerance studies is the selection of the appropriate heat stress regime, the developmental stage that the stress is applied to, as well as the method of application. Literature search reveals a rather high variability in heat stress treatments mainly due to the lack of standardized protocols for different plant species. In this review, we summarize and discuss experimental approaches that have been used in various crops, with special focus on tomato, rice and wheat, as the best studied crops regarding pollen thermotolerance. The overview of stress treatments and the major outcomes of each study aim to provide guidelines for similar research in other crops.

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

Cited by 62 publications

References 49 publications

Cloning and expression analysis of heat-shock transcription factor gene CaHsfA2 from pepper (Capsicum annuum L.)

Cloning and expression analysis of heat-shock transcription factor gene CaHsfA2 from pepper (Capsicum annuum L.)

Temperature and water stress affect plant–pollinator interactions in Borago officinalis (Boraginaceae)

Heat stress regimes for the investigation of pollen thermotolerance in crop plants

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