Pollen development in Rhododendron in relation to winter dormancy and bloom time

Mirgorodskaya, Olga E.; Koteyeva, Nuria K.; Volchanskaya, Alexandra; Miroslavov, E. A.

doi:10.1007/s00709-015-0764-y

Cited by 16 publications

(11 citation statements)

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“…Development can last from a few days to a few weeks in herbaceous annual and perennial plants (Pacini and Sarfatti, 1978; Alves Rodrigues et al, 2018), and up to several months in some woody gymno- and angiosperm plants (Chesnoy, 1987; Ferranti et al, 1996). Pollen development can pause at the pollen mother cell stage in some tree species ( Pseudotsuga menziesii , Abies pinsapo , Arbutus unedo ) (Singh et al, 1983; Chiarucci et al, 1993; Arista and Talavera, 1994), at the microspore stage ( Betula verrucosa , Rhododendron species) (Dunbar and Rowley, 1984; Mirgorodskaya et al, 2015), or at the bi-cellular stage ( Corylus avellana ) (Frenguelli et al, 1997). A decrease in pollen volume (12%) and a change in shape (spherical to oval) has been described in Corylus (Frenguelli et al, 1997).…”

Section: Analogies In Da Between Seed and Pollen: Does Pollen Da Exist?mentioning

confidence: 99%

“…A decrease in pollen volume (12%) and a change in shape (spherical to oval) has been described in Corylus (Frenguelli et al, 1997). The reduction in pollen volume is accompanied by appearance of small vacuoles in the cytoplasm and pro-plastids (Dunbar and Rowley, 1984; Mirgorodskaya et al, 2015). The length of pollen development is influenced by the environment and can differ during the wet and dry season of the year (e.g., Annona squamosa ) (Alves Rodrigues et al, 2018).…”

Section: Analogies In Da Between Seed and Pollen: Does Pollen Da Exist?mentioning

confidence: 99%

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Pollen Developmental Arrest: Maintaining Pollen Fertility in a World With a Changing Climate

Pacini

Dolferus

2019

Front. Plant Sci.

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During evolution of land plants, the haploid gametophytic stage has been strongly reduced in size and the diploid sporophytic phase has become the dominant growth form. Both male and female gametophytes are parasitic to the sporophyte and reside in separate parts of the flower located either on the same plant or on different plants. For fertilization to occur, bi-cellular or tri-cellular male gametophytes (pollen grains) have to travel to the immobile female gametophyte in the ovary. To survive exposure to a hostile atmosphere, pollen grains are thought to enter a state of complete or partial developmental arrest (DA). DA in pollen is strongly associated with acquisition of desiccation tolerance (DT) to extend pollen viability during air travel, but occurrence of DA in pollen is both species-dependent and at the same time strongly dependent on the reigning environmental conditions at the time of dispersal. Several environmental stresses (heat, drought, cold, humidity) are known to affect pollen production and viability. Climate change is also posing a serious threat to plant reproductive behavior and crop productivity. It is therefore timely to gain a better understanding of how DA and pollen viability are controlled in plants and how pollen viability can be protected to secure crop yields in a changing environment. Here, we provide an overview of how DA and pollen viability are controlled and how the environment affects them. We make emphasis on what is known and areas where a deeper understanding is needed.

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Section: Analogies In Da Between Seed and Pollen: Does Pollen Da Exist?mentioning

confidence: 99%

Section: Analogies In Da Between Seed and Pollen: Does Pollen Da Exist?mentioning

confidence: 99%

Pollen Developmental Arrest: Maintaining Pollen Fertility in a World With a Changing Climate

Pacini

Dolferus

2019

Front. Plant Sci.

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“…3) based on the differentiation of organ primordia. These primordia developed in a whorled pattern characteristic of most eudicots, including highbush blueberry (Vaccinium corymbosum) (Kovaleski et al, 2015) and Rhododendron (Mirgorodskaya et al, 2015), and other perennial fruits, such as blackberry (Rubus subgenus Rubus) (Takeda et al, 2002), and sweet cherry (Prunus avium) (Fad on et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

Floral Meristem Development in Cranberry Apical Buds during Winter Rest and Its Implication on Yield Prediction

Bolívar-Medina¹,

Villouta²,

Workmaster³

et al. 2019

J. Amer. Soc. Hort. Sci.

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The formation and development of floral meristems is key to fruit production. However, limited information regarding the development of floral buds during the dormant period of cranberry (Vaccinium macrocarpon) constrains the ability to forecast yield early and accurately. The objectives of this study were to characterize the development of floral meristems from fall to spring and to evaluate the number of floral meristems formed across different bud sizes and upright types, as well as their contribution to the fruit production of the next year. Apical buds of different sizes on vegetative and fruiting uprights were tagged and collected periodically from fall to spring for histological study. An extra set of tagged buds was left in the field to evaluate their flower and fruit production. Five stages of floral development were identified based on the concentric differentiation of organ primordia. Large buds from vegetative uprights developed earlier, had a higher number of floral meristems, and became fruiting uprights; they had the highest number of flowers and fruit. Buds from fruiting uprights had the lowest number of floral meristems and delayed development; subsequently, they had the lowest number of fruit per upright. Our results provide evidence of active floral meristem differentiation during fall and winter, as well as differences in the timing and development stage according to bud size. In addition, our study shows that upright types and bud sizes influence the fruit production of the following year; therefore, they should be considered in cranberry crop forecasting models.

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“…In Rhododendron luteum Sweet from Ericaceae (Mirgorodskaya and Miroslavov, 2012;Mirgorodskaya et al, 2015) and Ribes nigrum L. from Grossulariaceae (Koteyeva et al, 2015), tapetal cell walls loosen, and exocytosic vesicles appear on the plasmalemma surface at the stage of microspore tetrads. On the periphery of protoplast directed inside the locule, an electron-dense substance accumulates and globules (orbicules) arise at the stage of free microspores.…”

Section: Development and Structure Of Tapetummentioning

confidence: 99%

Tapetum Types and Forms in Angiosperms

Шамров

Anisimova

Babro

2021

Proceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences.

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Based on the analysis of literature and our own data, we have suggested a new version of the typification of types and forms of the tapetum. It is proposed to distinguish two types of tapetum: parietal and periplasmodial. Parietal tapetum lines the locule of microsporangium and this position is maintained throughout the development. A periplasmodial tapetum is characterised by the formation of a coenocyte as a result of the fusion of protoplasts, while the cytoplasm and nucleus are located not only between the developing microspores and pollen grains, but also come into contact with the inner layers of the cavity. The differences between tapetum types relate to the peculiarities of structural and temporal reorganisation in anther development. The protoplasts that form after the disappearance of the cell walls (usually at the stage of microspore tetrad, or after their disaggregation), gradually break down (form 1 – typical parietal tapetum), or they form protrusions inside the microsporangium cavity (form 2 – amoeboid tapetum). The protoplasts in the periplasmodial tapetum are formed before or during meiosis. They fuse resulting in a symplast. It is possible to distinguish two forms of periplasmodial tapetum: combining and invasing of protoplasts into the locule of microsporangium (form 1 – typical periplasmodial tapetum), and almost or partly fusion of protoplasts, which do not organise the invasions and maintain the initial position (form 2 – bordering symplast). Data on the diversity and structure of the tapetum, like any other characters, are used to clarify the position of taxa on the phylogenetic tree.

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Pollen development in Rhododendron in relation to winter dormancy and bloom time

Cited by 16 publications

References 50 publications

Pollen Developmental Arrest: Maintaining Pollen Fertility in a World With a Changing Climate

Pollen Developmental Arrest: Maintaining Pollen Fertility in a World With a Changing Climate

Floral Meristem Development in Cranberry Apical Buds during Winter Rest and Its Implication on Yield Prediction

Tapetum Types and Forms in Angiosperms

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