Pollen aquaporins: What are they there for?

Giorgio, Juliana Andrea Pérez Di; Barberini, María Laura; Amodeo, Gabriela; Muschietti, Jorge

doi:10.1080/15592324.2016.1217375

Cited by 13 publications

(7 citation statements)

References 15 publications

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“…Reductions in the expression of AtNIP4;1 and AtNIP4;2 by RNAi markedly inhibit pollen germination and pollen tube elongation, and decrease seed fertility. Further studies showed that the water permeable activities of AtNIP4;1 and AtNIP4;2 are regulated by phosphorylation at Ser-267 of the C termini by a pollen-specific calcium-dependent protein kinase 34 [ 127 , 143 ] ( Figure 3 c). Thus, the kinase-modulated AtNIP4;1 and AtNIP4;2 are important for pollen germination and pollen tube elongation.…”

Section: Roles Of Aqps In Reproductive Development Seed Developmementioning

confidence: 99%

Versatile Roles of Aquaporins in Plant Growth and Development

Wang

Zhao

Liu

et al. 2020

IJMS

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Aquaporins (AQPs) are universal membrane integrated water channel proteins that selectively and reversibly facilitate the movement of water, gases, metalloids, and other small neutral solutes across cellular membranes in living organisms. Compared with other organisms, plants have the largest number of AQP members with diverse characteristics, subcellular localizations and substrate permeabilities. AQPs play important roles in plant water relations, cell turgor pressure maintenance, the hydraulic regulation of roots and leaves, and in leaf transpiration, root water uptake, and plant responses to multiple biotic and abiotic stresses. They are also required for plant growth and development. In this review, we comprehensively summarize the expression and roles of diverse AQPs in the growth and development of various vegetative and reproductive organs in plants. The functions of AQPs in the intracellular translocation of hydrogen peroxide are also discussed.

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Section: Roles Of Aqps In Reproductive Development Seed Developmementioning

confidence: 99%

Versatile Roles of Aquaporins in Plant Growth and Development

Wang

Zhao

Liu

et al. 2020

IJMS

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“…In pollen grains, aquaporins play a role in mobilizing soluble carbohydrates, proline and interconverting enzymes between the vegetative and generative cells. This is important for maintaining pollen viability in response to environmental conditions (Kononowicz et al, 1992; Bots et al, 2005b; Anil Kumar et al, 2015; Pérez Di Giorgio, 2016). Similar to drought and other abiotic stresses, protection against reactive oxygen species (ROS) is activated and mitochondrial activity is decreased.…”

Section: Pollen Desiccation and Its Relationship To Sporophytic Drougmentioning

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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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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“…However their presence and expression may vary among plant species, tissues and time during development. In plants, AQPs are present in almost all organs, including the roots, leaves, stems, flowers, fruits, seeds, dry seeds [60], pollen [13,[61][62][63], anther and specific cells such as the guard cells [64,65]. Moreover, some TIPs are expressed in specific tissues, e.g.…”

Section: Study Of the Tissue-and Developmental-dependent Expression Omentioning

confidence: 99%

TIP Aquaporins in Plants: Role in Abiotic Stress Tolerance

Kurowska¹

2021

Abiotic Stress in Plants

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Tonoplast Intrinsic Proteins (TIP) are one of five subfamilies of aquaporins in higher plants. Plants typically contain a large number of TIP genes, ranging from 6 to 35 compared to humans. The molecular weight of the TIP subfamily members ranges from 25 to 28 kDa. Despite their sequence diversity, all TIP monomers have the same structure, which consists of six transmembrane helices and five inter-helical loops that form an hourglass shape with a central pore. Four monomers form tetramers, which are functional units in the membrane. TIPs form channels in the tonoplast that basically function as regulators of the intracellular water flow, which implies that they have a role in regulating cell turgor. TIPs are responsible for precisely regulating the movement of not only water, but also some small neutral molecules such as glycerol, urea, ammonia, hydrogen peroxide and formamide. The expression of TIPs may be affected by different environmental stresses, including drought, salinity and cold. TIPs expression is also altered by phytohormones and the appropriate cis-regulatory motifs are identified in the promotor region of the genes encoding TIPs in different plant species. It was shown that manipulating TIP-encoding genes expression in plants could have the potential to improve abiotic stress tolerance.

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Pollen aquaporins: What are they there for?

Cited by 13 publications

References 15 publications

Versatile Roles of Aquaporins in Plant Growth and Development

Versatile Roles of Aquaporins in Plant Growth and Development

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

TIP Aquaporins in Plants: Role in Abiotic Stress Tolerance

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