Climatic seasonality influences the development of pollen grains and fruiting in Annona squamosa

Rodrigues, Bruno Rafael Alves; Nietsche, Sílvia; Mercadante-Simões, Maria Olívia; Pereira, Marlon Cristian Toledo; Ribeiro, Leonardo Monteiro

doi:10.1016/j.envexpbot.2018.03.025

Cited by 14 publications

(16 citation statements)

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“…The duration of angiosperm male gametophyte development can depend on atmospheric conditions and varies considerably between species (Lersten, 2008). 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).…”

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

confidence: 99%

“…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). When DA occurs during the early stages of pollen development, it is not always associated with desiccation.…”

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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“…The high percentage of fruit setting and effective fruiting observed in the present study regardless of the fruiting management methods applied can be attributed to a number of factors, including climatic conditions. Studies on artificial pollination and/or application of growth regulators in flowers aiming at obtaining parthenocarpic fruits indicate that temperatures between 25 and 30°C and relative humidity above 50% are highly correlated with the viability of pollen grains and fruits, and are considered ideal conditions for the development of plants (Judd et al, 1999;Rodrigues et al, 2018).…”

Section: Resultsmentioning

confidence: 99%

Characterization of ‘Gefner’ atemoya seedless fruits with GA3 application

Pinto

Pereira

Nietsche

et al. 2018

Agraria

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The present study was carried out with the objective of evaluating the effect of artificial pollination and gibberellic acid (GA 3) in different doses and times of application in the fruit set, effective fruiting and the quality of 'Gefner' atemoieira fruits. The experimental design was in randomized blocks, with thirteen treatments, four replicates and five plants per plot. The treatments applied were different doses of GA 3 : 100, 150, 200, 250, 500 and 1000 mg L-1 associated or not with artificial pollination. It was evaluated every seven days the fruit set, length and diameter of the fruits, and after the harvest the physical and chemical characteristics of the fruits. The growth rate of fruit length and diameter showed a sigmoid pattern with the highest growth peaks in all treatments at the 4 th and 5 th weeks after the anthesis. The application of 1000 mg L-1 GA 3 , without artificial pollination, divided in four times from the anthesis yielded seedless fruits with physical and chemical quality equivalent to the fruits of artificial pollination. The artificial pollination associated to two applications of 250 mg L-1 of GA 3 showed high fruit set and fruits with greater length, diameter, mass of the fruits and reduction of the total fresh mass of the seeds.

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“…The acidic polysaccharides composing the mucilage of M. pubescens are compartmentalized in vacuoles formed by the fusion of dictyosome vesicles. Dictyosomes, associated with the synthesis of strongly hydrophilic acidic polysaccharides having a fibrillar appearance (when viewed with transmission electron microscopy) are well documented in seeds (McFarlane et al., ; Young et al., ; Haughn and Western, ; Voiniciuc, ; Płachno et al., ; Phan and Burton, ) and other mucilage‐secreting structures (Mercadante‐Simões and Paiva, ; Ballego‐Campos and Paiva, ; Gonçalves et al., ; Rodrigues et al., ).…”

Section: Discussionmentioning

confidence: 99%

Secondary‐cell‐wall release: a particular pattern of secretion in the mucilaginous seed coat of Magonia pubescens

Souza

Mercadante-Simões

Ribeiro

2020

American J of Botany

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Premise Plant mucilages are composed of strongly hydrophilic polysaccharides and contribute to seed germination and seedling establishment. The myxospermic seeds of Magonia pubescens, a Cerrado (neotropical savanna) tree species, produces a voluminous mucilage capsule when hydrated. The development of the mucilaginous layer, the process of mucilage secretion and its role in seed germination was not previously studied so far. Methods Morphological, anatomical, histochemical, and ultrastructural evaluations of the seed coat during seed development were undertaken. The formation of the mucilage capsule was followed using scanning electron microscopy, and the coat's effects on seed hydration and germination were evaluated after experimental manipulation of the seed coat. Results The mucilaginous layer is contained in the outer coat of the seed. The mucilage‐secreting cells accumulate proteins in the outer periclinal region and acidic polysaccharides in the inner periclinal region of the periplasmic space. Neutral polysaccharides, which form the loosely organized secondary wall, form a folding, basket‐like structure surrounding the acidic polysaccharides. The protoplast collapses at maturity. With hydration, the mucilage expands, breaks the epidermal layer, and forms a mucilage capsule around the seed. The mucilaginous seed coat does not increase the germination rate. Conclusions Upon mucilage hydration, the secondary cell walls forming the network of neutral polysaccharides are released, along with proteins, and help retain the acidic polysaccharides—forming a peculiar architecture that imparts integrity and consistency to the mucilage capsule. As winged seeds are not usually buried, the mucilage capsule favors seedling hydration, contributing to its establishment on the soil surface.

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Climatic seasonality influences the development of pollen grains and fruiting in Annona squamosa

Cited by 14 publications

References 53 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

Characterization of ‘Gefner’ atemoya seedless fruits with GA3 application

Secondary‐cell‐wall release: a particular pattern of secretion in the mucilaginous seed coat of Magonia pubescens

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