Hormonal regulation of reproductive growth under normal and heat-stress conditions in legume and other model crop species

Ozga, Jocelyn A.; Kaur, Harleen; Savada, Raghavendra P.; Reinecke, Dennis M.

doi:10.1093/jxb/erw464

Cited by 54 publications

(64 citation statements)

References 117 publications

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“…Some plants begin to produce infertile pollen grains at temperatures as low as 30°C during the day or 20°C at night (131,135). In addition, elevated temperatures have profound impacts on the development of seeds postfertilization (121). For example, high-temperature-stressed micro-and megagametophytes abort fruit and seed development in Brassica napus (192).…”

Section: High-temperature Stressmentioning

confidence: 99%

A Molecular View of Plant Local Adaptation: Incorporating Stress-Response Networks

VanWallendael

Soltani

Emery

et al. 2019

Annu. Rev. Plant Biol.

110

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Ecological specialization in plants occurs primarily through local adaptation to different environments. Local adaptation is widely thought to result in costly fitness trade-offs that result in maladaptation to alternative environments. However, recent studies suggest that such trade-offs are not universal. Further, there is currently a limited understanding of the molecular mechanisms responsible for fitness trade-offs associated with adaptation. Here, we review the literature on stress responses in plants to identify potential mechanisms underlying local adaptation and ecological specialization. We focus on drought, high and low temperature, flooding, herbivore, and pathogen stresses. We then synthesize our findings with recent advances in the local adaptation and plant molecular biology literature. In the process, we identify mechanisms that could cause fitness trade-offs and outline scenarios where trade-offs are not a necessary consequence of adaptation. Future studies should aim to explicitly integrate molecular mechanisms into studies of local adaptation.

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Section: High-temperature Stressmentioning

confidence: 99%

A Molecular View of Plant Local Adaptation: Incorporating Stress-Response Networks

VanWallendael

Soltani

Emery

et al. 2019

Annu. Rev. Plant Biol.

110

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“…Without doubt, ABA‐induced HSPs play crucial roles in heat tolerance in plants (Ozga et al ). Specifically, it has been reported that the ABA‐induced accumulation of HSP70 in plants under heat stress is mediated by hydrogen peroxide (H 2 O 2 ) (Hu et al , Li et al ).…”

Section: Introductionmentioning

confidence: 99%

Abscisic acid prevents pollen abortion under high‐temperature stress by mediating sugar metabolism in rice spikelets

Rezaul

Feng

Chen

et al. 2018

Physiologia Plantarum

109

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Heat stress at the pollen mother cell (PMC) meiotic stage leads to pollen sterility in rice, in which the reactive oxygen species (ROS) and sugar homeostasis are always adversely affected. This damage is reversed by abscisic acid (ABA), but the mechanisms underlying the interactions among the ABA, sugar metabolism, ROS and heat shock proteins in rice spikelets under heat stress are unclear. Two rice genotypes, Zhefu802 (a recurrent parent) and fgl (its near-isogenic line) were subjected to heat stress of 40°C after pre-foliage sprayed with ABA and its biosynthetic inhibitor fluridone at the meiotic stage of PMC. The results revealed that exogenous application of ABA reduced pollen sterility caused by heat stress. This was achieved through various means, including: increased levels of soluble sugars, starch and non-structural carbohydrates, markedly higher relative expression levels of heat shock proteins (HSP24.1 and HSP71.1) and genes related to sugar metabolism and transport, such as sucrose transporters (SUT) genes, sucrose synthase (SUS) genes and invertase (INV) genes as well as increased antioxidant activities and increased content of adenosine triphosphate and endogenous ABA in spikelets. In short, exogenous application of ABA prior to heat stress enhanced sucrose transport and accelerated sucrose metabolism to maintain the carbon balance and energy homeostasis, thus ABA contributed to heat tolerance in rice.

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“…In the case of Hibiscus surattensis L., these aborted seeds were found in the same plant as well as plants growing in different localities. Such occurrence indirectly implies that apart from the external factors, genetic factor in scripted in the genes operate the programmed cell death in the maturing seeds at one point of time during the seed maturation and/or hormonal regulations controlled by specific genes (Matilla, 2019;Ozga, Kaur, Savada, & Reinecke, 2016;Wiens, King, Nickrent, Calvin, & Vivrette, 1989). In such cases, it could reasonably be presumed that abortive seed production might also be a genetic character and this character can be considered as species specific in Hibiscus surattensis L. However, to elucidate such presumption, further study is required to trace out at what stage and what genetic cue is responsible for such abortion during seed maturation.…”

Section: Discussionmentioning

confidence: 99%

SEM and light microscopic studies in seeds of Hibiscus surattensis L. and phylogenetic attributes in Puducherry region, India

Ilakiya

Ramamoorthy

2020

Geology, Ecology, and Landscapes

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The micro-morphological and scanning electron microscopic (SEM) studies in seeds of Hibiscus surattensis L. has brought out five interesting as well as taxonomically and phylogenetic important traits for the first time. Hibiscus surattensis L. belongs to the family Malvaceae, located at Puducherry region, India. 1. There is a change in the number of locules from pentacarpellary in the ovary during seed maturation and tetra-carpellary after seed maturation in the capsule; 2. Capsules contain both aborted and fully matured seeds recording an average of 4 aborted in 10 capsules; 3. Trichome on seeds consisted of bundle of unicellular finger-like structures, non-glandular and appressed; more importantly hilum is lined with trichomes; 4. Trichomes originate from the outer seed coat as extension/elongation of reticulate-foveatetype seed surface. 5. Embryo was folded occupying both poles and represented approximately the one-third of embryo. Size of the seed, colour, and shape of the seed, surface patterns of seed were examined using SEM. Factors responsible for the production of abortive seeds, functional attributes of non-glandular trichomes and other features are discussed in detail with relevant SEM and microscopic images. Further, phylogenetic importance in elucidating evolutionary clade is also explained. The partial sequence of chloroplast DNA of Hibiscus surattensis L. and neighbourhood joining trees are done for the first time in the study plant growing in India.

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Hormonal regulation of reproductive growth under normal and heat-stress conditions in legume and other model crop species

Cited by 54 publications

References 117 publications

A Molecular View of Plant Local Adaptation: Incorporating Stress-Response Networks

A Molecular View of Plant Local Adaptation: Incorporating Stress-Response Networks

Abscisic acid prevents pollen abortion under high‐temperature stress by mediating sugar metabolism in rice spikelets

SEM and light microscopic studies in seeds of Hibiscus surattensis L. and phylogenetic attributes in Puducherry region, India

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