Results 91 to 100 of about 1,166,538 (311)
BMC Plant Biology, 2019 Background During sexual reproduction, pollen grains land on the stigma, rehydrate and produce pollen tubes that grow through the female transmitting-tract tissue allowing the delivery of the two sperm cells to the ovule and the production of healthy ...
Ferdousse Laggoun +8 more
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Structural basis for receptor recognition of pollen tube attraction peptides
Nature Communications, 2017 Transportation of the immobile sperms directed by pollen tubes to the ovule-enclosed female gametophytes is important for plant sexual reproduction.
Xiaoxiao Zhang +7 more
semanticscholar +1 more source
Parakaempferia alba sp. nov. (Zingiberaceae), a new species from Arunachal Pradesh, India
Nordic Journal of Botany, EarlyView.Parakaempferia alba, a new species of Zingiberaceae from East Siang district of Arunachal Pradesh, India is herein described. A detailed taxonomic description, diagnosis, color photoplate, distribution map, notes on habitat and ecology, conservation status, and a table of comparisons with the closely related species Parakaempferai synantha Rao & Verma ...
Tatum Mibang +3 more
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Taxonomy and diversity of Marcgraviaceae, north of the São Francisco river, northeast Brazil
Nordic Journal of Botany, EarlyView.This study provides a comprehensive assessment of Marcgraviaceae species diversity north of the São Francisco river in northeastern Brazil, analyzing species richness and distribution patterns across 384 000 km² of phytogeographic domains. Through field collections, herbarium studies (both physical and digital), and detailed morphological analyses, we ...
Thales Carvalho +4 more
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, 2017 A knowledge of pollen functions and its development in the genus Rosa is often of the greatest importance to the rose breeders and scientists when planning a hybridization program and research. The following paragraphs, therefore, brings together all the available scientific information from pollen formation to fertilization and its management.
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Arisaema siahaense sp. nov. (Araceae) from India
Nordic Journal of Botany, EarlyView.A new species of Arisaema Mart. (Araceae) belonging to sect. Fimbriata is described and illustrated here from the Siaha District, Mizoram, India. This new species is characterized by an evergreen, dioecious herbaceous habit, up to 1.08 m high, having a subglobose tuber, with a solitary trifoliate leaf.
Rabishankar Sengupta +1 more
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Frontiers in Plant Science, 2016 Nitric oxide (NO) as a signaling molecule plays crucial roles in many abiotic stresses in plant development processes, including pollen tube growth. Here, the signaling networks dominated by NO during cold stress that inhibited Camellia sinensis pollen ...
Weidong eWang +8 more
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Frontiers in Plant Science, 2017 Proper growth of the pollen tube depends on an elaborate mechanism that integrates several molecular and cytological sub-processes and ensures a cell shape adapted to the transport of gametes.
I. Aloisi +5 more
semanticscholar +1 more source
Oikos, EarlyView.Seasonal environmental cycles affect plant–pollinator interactions by altering plant phenology. Periods of low resource availability can filter pollinators and reduce the complexity of interaction networks, but the extent to which the functional morphology of pollinators influences such filtering remains unclear.
Ugo M. Diniz +3 more
wiley +1 more source
Pollen-specific pectin methylesterase involved in pollen tube growth
Developmental Biology, 2006 Pollen tube elongation in the pistil is a crucial step in the sexual reproduction of plants. Because the wall of the pollen tube tip is composed of a single layer of pectin and, unlike most other plant cell walls, does not contain cellulose or callose, pectin methylesterases (PMEs) likely play a central role in the pollen tube growth and determination ...
Tian, Guo-Wei +3 more
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