Gibberellin-Induced Gene Expression Associated with Cytoplasmic Male Sterility in Sunflower

Duca, Maria; Port, Angela; Orozco-Cárdenas, Martha L.; Lovatt, Carol J.

doi:10.1080/13102818.2008.10817536

Cited by 12 publications

(7 citation statements)

References 57 publications

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“…It may induced by some external factors which lead to abnormal meiosis and pollen sterility and ultimately to a reduction in seed set. Similarly in our study, GA 3 spraying in test crop has induced male sterility; that might be the consequence of abnormal meiosis and post meiosis The work of Anashchenko (1971) and Duca et al (2008) with exogenous GA 3 application on sunflower had led to the conclusion that the male sterility induction effect by GA 3 is restricted to specific stage (R1 and R2) of blossoming. Depending on the species examined and the concentration used, GAs can promote, inhibit, or have no effect on pollen germination and tube elongation in vitro (Bhandal and Malik 1979;Viti et al 1990;Setia et al 1994).…”

Section: Discussionsupporting

confidence: 78%

Gibberellic acid-mediated male sterility during gametogenesis of Brassica campestris L.

Kumar

Dwivedi

2014

Chromosome Botany

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The present work was done to elucidate the impact of gibberellic acid (GA 3) on male meiosis of Brassica campestris L. with an aim to study its cytological peculiarities. Microsporogenesis analysis of distilled water treated sets displayed the normal meiotic and post-meiotic courses. However GA 3 sprayed sets possessed several meiotic manifestations followed by disturbed postmeiosis. In present case meiotic irregularities followed by unusual tetrad configurations such as tetrad having randomly arranged microspores, completely vacant (sterile) tetrad, monad (microsporesac bearing one microspore), dyad (two microspores), triad (three microspores) and polyads (more than four microspores) were registered. As a consequence of such an anomalous microsporogenesis, pollen fertility rate of the present crop has been declined considerably in a dose dependent manner whereas its direct and negative influence on the reproductive success of the test crop has been determined. In ours study, marked dropdown in the reproductive success has been recorded; which was estimated on the basis of rate of increased pollen abortion which in turn led to considerable decreased seed set of crop at maturity.

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Section: Discussionsupporting

confidence: 78%

Gibberellic acid-mediated male sterility during gametogenesis of Brassica campestris L.

Kumar

Dwivedi

2014

Chromosome Botany

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“…It is interesting to note that depending on the applied growth regulators, HvGAMYB relative expression level was different for the early- and late-heading plants. Transgenic barley lines with an excess of fourfold levels of endogenous GAMYB protein in their anthers were reported to be male sterile (Murray et al 2003 ; Duca et al 2008 ). Also, a progressive decrease in anther size was associated with the increase in GAMYB levels, particularly a decrease in anther length (Murray et al 2003 ).…”

Section: Discussionmentioning

confidence: 99%

The effects of heading time on yield performance and HvGAMYB expression in spring barley subjected to drought

et al. 2023

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In the lifetime of a plant, flowering is not only an essential part of the reproductive process but also a critical developmental stage that can be vulnerable to environmental stresses. To ensure survival during drought, plants accelerate the flowering process, and this response is known as “drought escape.” HvGAMYB—transcription factor associated, among others, with flowering process and anther development in barley—has also an important role in developmental modification and yield performance in plants subjected to stressed conditions. Due to the fact that information about the mechanisms associated both with the flowering acceleration and the anther or pollen disruption is limited, the exploration of the potential HvGAMYB role in flower development may shed light on pollen and spike morphology formations in plants grown under unfavorable water conditions. The aim of this study was to characterize differences in responses to drought among early- and late-heading barley genotypes. These two subgroups of plants—differentiated in terms of phenology—were analyzed, and traits linked to plant phenotype, physiology, and yield were investigated. In our study, the drought stress reactions of two barley subgroups showed a wide range of diversity in terms of yield performance, anther morphology, chlorophyll fluorescence kinetics, and pollen viability. The studied plants exhibited different yield performances under control and drought conditions. Moreover, the random distribution of genotypes on the biplot showing variability of OJIP parameters in the second developmental point of our investigation revealed that prolonged drought stress caused that among early- and late-heading plants, the studied genotypes exhibited different responses to applied stress conditions. The results of this study also showed that the HvGAMYB expression level was correlated positively with traits associated with lateral spike morphology in the second developmental point of this investigation, which showed that this association occurred only under prolonged drought and highlighted the drought stress duration effect on the HvGAMYB expression level.

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“…In our study, HvGAMYB was expressed at a relatively high level in anthers collected from the CamB plants subjected to drought in LFE1. Transgenic barley lines with a fourfold higher level of endogenous GAMYB protein in their anthers were reported to be male sterile [94,95]. In our study, the relatively high expression level of this transcription factor in anthers collected from CamB plants cannot be linked to pollen -even partially -sterility as in D condition the traits associated with pollen morphology as well as pollen viability did not seem to be affected by drought.…”

Section: Hvgamyb Expression Fluctuationmentioning

confidence: 48%

Dark-Induced Effects on Pollen Development and HvGAMYB Expression in Spring Barley (<em>Hordeum vulgare</em> L.) Genotypes with Contrasting Drought Tolerance

Ogrodowicz¹,

Wojciechowicz²,

Kuczyńska³

et al. 2023

Preprint

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Drought stress inducing pollen sterility can reduce crop yield worldwide. The regulatory crosstalk associated with the effects of drought on pollen formation at the cellular level have not been explored in detail so far. In this study, we performed morphological and cytoembryological analysis of anther perturbations and examined pollen development in two spring barley genotypes that differ in earliness and drought tolerance. The Syrian breeding line CamB (drought-tolerant) and the European cultivar Lubuski (drought-sensitive) were used as experimental materials to analyze the drought-induced changes in yield performance, chlorophyll fluorescence kinetics, the pollen grain micromorphology and ultrastructure during critical stages of plant development. In addition, fluctuations in HvGAMYB expression were studied, as this transcription factor is closely associated with the anthers development. In the experiments, the studied plants were affected by drought, as was confirmed by the analyses of yield performance and chlorophyll fluorescence kinetics. However, contrary to our expectations, the pollen development of plants grown under specific conditions was not severely affected. The results also suggest that growth modification, as well as the perturbation in light distribution, can affect the HvGAMYB expression. This study showed that the duration of the vegetation period can influence plant drought responses and, as a consequence, the processes associated with pollen development as every growth modification changes the dynamics of drought effects as well as the duration of plant exposition to drought.

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Gibberellin-Induced Gene Expression Associated with Cytoplasmic Male Sterility in Sunflower

Cited by 12 publications

References 57 publications

Gibberellic acid-mediated male sterility during gametogenesis of Brassica campestris L.

Gibberellic acid-mediated male sterility during gametogenesis of Brassica campestris L.

The effects of heading time on yield performance and HvGAMYB expression in spring barley subjected to drought

Dark-Induced Effects on Pollen Development and HvGAMYB Expression in Spring Barley (<em>Hordeum vulgare</em> L.) Genotypes with Contrasting Drought Tolerance

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