Stomata: the holey grail of plant evolution

McAdam, Scott A. M.; Duckett, Jeffrey G.; Sussmilch, Frances C.; Pressel, Silvia; Renzaglia, Karen S.; Hedrich, Rainer; Brodribb, Timothy J.; Merced, Amelia

doi:10.1002/ajb2.1619

Cited by 22 publications

(9 citation statements)

References 64 publications

(100 reference statements)

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“…However, this study was performed using an extremely high concentration of sorbitol (800 mM). It is unclear therefore whether these results have any physiological relevance (McAdam et al, 2021), especially in ferns that have low both photosynthetic rate (Gago et al, 2019; Tosens et al, 2016) and the capacity to produce ABA (Cardoso & McAdam, 2019). Further studies using relevant physiological concentrations of ABA and osmotic compounds are needed to better understand the evolution of stomatal regulation.…”

Section: Introductionmentioning

confidence: 99%

Metabolism‐mediated mechanisms underpin the differential stomatal speediness regulation among ferns and angiosperms

Cândido‐Sobrinho

Lima

Freire

et al. 2021

Plant Cell & Environment

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Recent results suggest that metabolism‐mediated stomatal closure mechanisms are important to regulate differentially the stomatal speediness between ferns and angiosperms. However, evidence directly linking mesophyll metabolism and the slower stomatal conductance (gs) in ferns is missing. Here, we investigated the effect of exogenous application of abscisic acid (ABA), sucrose and mannitol on stomatal kinetics and carried out a metabolic fingerprinting analysis of ferns and angiosperms leaves harvested throughout a diel course. Fern stomata did not respond to ABA in the time period analysed. No differences in the relative decrease in gs was observed between ferns and the angiosperm following provision of sucrose or mannitol. However, ferns have slower gs responses to these compounds than angiosperms. Metabolomics analysis highlights that ferns have a higher accumulation of secondary rather than primary metabolites throughout the diel course, with the opposite being observed in angiosperms. Our results indicate that metabolism‐mediated stomatal closure mechanisms underpin the differential stomatal speediness regulation among ferns and angiosperms, in which the slower stomatal closure in ferns is associated with the lack of ABA‐responsiveness, to a reduced capacity to respond to mesophyll‐derived sucrose and to a higher carbon allocation toward secondary metabolism, which likely modulates both photosynthesis‐gs and growth‐stress tolerance trade‐offs.

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Section: Introductionmentioning

confidence: 99%

Metabolism‐mediated mechanisms underpin the differential stomatal speediness regulation among ferns and angiosperms

Cândido‐Sobrinho

Lima

Freire

et al. 2021

Plant Cell & Environment

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“…Stomata influence the rate of water evaporation from plants, and the amount of water loss affects the plant’s tolerance to drought stress. Except for some bryophytes with highly developed microtubular tissues [ 46 ], the degree of plant stomatal opening size is closely related to water loss and also reduces pathogens entering through the pores, this is a key feature for water conservation and disease prevention [ 47 , 48 , 49 ]. Our results confirmed that after being subjected to drought stress, the stomata of TRV: GPDH5 plants had significantly larger stomatal openings than those of the negative control, such a phenomenon is likely to cause accelerated water loss in the silenced plants.…”

Section: Discussionmentioning

confidence: 99%

Genome-Wide Identification of Cotton (Gossypium spp.) Glycerol-3-Phosphate Dehydrogenase (GPDH) Family Members and the Role of GhGPDH5 in Response to Drought Stress

Sun

Cui

et al. 2022

Plants

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Glycerol-3-phosphate dehydrogenase (GPDH) is a key enzyme in plant glycerol synthesis and metabolism, and plays an important role in plant resistance to abiotic stress. Here, we identified 6, 7, 14 and 14 GPDH genes derived from Gossypium arboreum, Gossypium raimondii, Gossypium barbadense and Gossypium hirsutum, respectively. Phylogenetic analysis assigned these genes into three classes, and most of the genes within the family were expanded by whole-genome duplication (WGD) and segmental duplications. Moreover, determination of the nonsynonymous substitution rate/synonymous substitution rate (Ka/Ks) ratio showed that the GPDH had an evolutionary preference for purifying selection. Transcriptome data revealed that GPDH genes were more active in the early stages of fiber development. Additionally, numerous stress-related cis-elements were identified in the potential promoter region. Then, a protein–protein-interaction (PPI) network of GPDH5 in G. hirsutum was constructed. In addition, we predicted 30 underlying miRNAs in G. hirsutum. Functional validation results indicated that silencing GhGPDH5 diminished drought tolerance in the upland cotton TM-1 line. In summary, this study provides a fundamental understanding of the GPDH gene family in cotton, GhGPDH5 exerts a positive effect during drought stress and is potentially involved in stomatal closure movements.

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“…and Barbula agraria Hedw. (de Oliveira and Pôrto, 2005), or in the liverwort Marchantia polymorpha L. (McAdam et al, 2021). In the latter case, all female plants were fertilized.…”

Section: Discussionmentioning

confidence: 99%

Sex‐specific differences in reproductive life‐history traits of the moss Weissia jamaicensis

Santos

Pôrto

Pinheiro

2022

American J of Botany

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Premise: We investigated sex-specific differences in the life-history traits of a metapopulation of the dioicous moss Weissia jamaicensis. Field observations revealed high rates of fertilization, which is uncommon for most dioicous bryophytes. We raised four hypotheses associated with the way the reproductive traits are related to the fertilization rate in this metapopulation. Methods: We sampled 10 patches of the metapopulation and quantified sexual expression, sex ratio, reproductive success, and reproductive allocation. The ramets were classified as male, non-sporophytic female, sporophytic female, or non-sexexpressing. Thirty ramets from each of the categories expressing sex were placed for regeneration to test the effect of reproductive allocation on this trait. Results: We found greater expression of the female function in all patches, implying a female bias in the metapopulation. The number of male ramets was variable in each patch and did not affect reproductive success. At the prezygotic level, the allocation of resources to the male function was higher. However, the large allocation of resources to sporophyte development in sporophytic females, which exceeded allocations at prezygotic levels, was related to the higher mortality rate of these ramets, suggesting reproductive cost. Conclusions: The prezygotic ramets that allocated the greatest amount of resources to reproduction expressed sex less frequently, biasing the sex ratio toward the sex that allocated the least amount of resources to reproduction. Overall, the ramets that allocated the greatest amount of resources to reproduction had the lowest regeneration rate, suggesting reproductive cost.

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Stomata: the holey grail of plant evolution

Cited by 22 publications

References 64 publications

Metabolism‐mediated mechanisms underpin the differential stomatal speediness regulation among ferns and angiosperms

Metabolism‐mediated mechanisms underpin the differential stomatal speediness regulation among ferns and angiosperms

Genome-Wide Identification of Cotton (Gossypium spp.) Glycerol-3-Phosphate Dehydrogenase (GPDH) Family Members and the Role of GhGPDH5 in Response to Drought Stress

Sex‐specific differences in reproductive life‐history traits of the moss Weissia jamaicensis

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