Results 21 to 30 of about 2,725 (226)

Reproductive Biology of Astragalus argaeus (Fabaceae), a critically endangered endemic species

open access: yesAnais da Academia Brasileira de Ciências, 2021
Astragalus argaeus is an endemic plant species that is under critical risk of extinction. Here we investigated its population census, breeding system and reproductive success to determine the main factors affecting restricted distribution of this species.
BAYRAM ATASAGUN   +3 more
doaj   +1 more source

Effects of temperature on the pollination biology of Luntai Xiaobai apricot [PDF]

open access: yesGuoshu xuebao
[Objective] The study aimed to investigate the influence of temperature on the pollination biology of Luntai Xiaobai apricot (Prunus armeniaca L.) in order to provide a theoretical foundation for determining the optimal timing for artificially assisted ...
XIE Lixing   +6 more
doaj   +1 more source

Natural and artificial pollination of white-fleshed pitaya

open access: yesAnais da Academia Brasileira de Ciências, 2022
To produce pitaya (Hylocereus spp.), it is essential that pollination occur, either artificially or by pollinating agents. This study evaluated the viability of self-pollination, cross-pollination, and natural pollination, as well as pollen viability ...
RENATA A. MOREIRA   +7 more
doaj   +1 more source

Is the pollination efficiency of long-lived orchid flowers affected by age?

open access: yesRevista Ceres, 2015
The long-lived flowers of orchids increase the chances of pollination and thus the reproductive success of the species. However, a question arises: does the efficiency of pollination, expressed by fruit set, vary with the flower age?
Rúbia Santos Fonseca   +2 more
doaj   +1 more source

Biologia reprodutiva de Acacia mearnsii De Wild.: receptividade de estigmas Reproductive biology of Acacia mearnsii De Wild.: stigma receptivity

open access: yesRevista Árvore, 2008
O objetivo deste trabalho foi analisar a receptividade de estigmas de Acacia mearnsii De Wild. em 20 árvores da Área de Produção de Sementes (APS) da Fazenda Locatelli, da empresa SETA S.A., no município de Butiá (RS) e comparar os períodos de ...
Eudes Maria Stiehl-Alves   +1 more
doaj   +1 more source

Morphological characterization and pollen –pistil interaction in selected genotypes of sunnhemp (Crotalaria juncea L.)

open access: yesElectronic Journal of Plant Breeding, 2021
Thirty six morphological characters consisting of sixteen biometrical and twenty qualitative characters were studied in six genotypes of sunnhemp (Crotalaria juncea L.), a fibre cum green manure crop of the tropics.
Ananthu Rajagopal¹, N. Meenakshi ganesan¹̽, P. Anantharaju² and R.Gnanam³
doaj   +1 more source

Rubus glaucus Benth.: morphology and floral biology aimed at plant breeding processes

open access: yesRevista Facultad Nacional de Agronomía Medellín, 2019
Rubus glaucus is widely distributed throughout the three mountain ranges of Colombia, where the blackberry growers have highlighted the need to standardize the supply of planting material, starting with plant breeding schemes that lead to more productive
Ana María López Gutiérrez   +3 more
doaj   +1 more source

Nocturnal and diurnal pollination in Copaifera coriacea, a dominant species in sand dunes of the Middle São Francisco River Basin, Northeastern Brazil [PDF]

open access: yesPlant Ecology and Evolution, 2021
Background and aims – Copaifera coriacea, a species in the resin-producing clade Detarioideae (Leguminosae), is an endemic and abundant species found in sand dunes in Brazilian Caatinga domain vegetation – a Quaternary paleodesert. We investigated floral
Isys Mascarenhas Souza   +3 more
doaj   +3 more sources

Receptivity of Exserted Stigmas

open access: yes, 1988
This article 'Receptivity of Exserted Stigmas' appeared in the International Rice Research Newsletter series, created by the International Rice Research Institute (IRRI). The primary objective of this publication was to expedite communication among scientists concerned with the development of improved technology for rice and for rice based cropping ...
Xu, Y. B., Shen, Z. T.
openaire   +1 more source

Pollen viability and stigma receptivity in Swainsona formosa (G.Don) J.Thompson (Fabaceae), an ornamental legume native to Australia

open access: yesOrnamental Horticulture, 2019
Pollen viability and stigma receptivity are prerequisites for successful cross-pollination and seed set in Swainsona formosa. In this study, the pollen viabilities and stigma receptivities was assayed by in vitro pollen germination and simple hand ...
Zulkarnain Zulkarnain   +2 more
doaj   +1 more source

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