نتایج جستجو برای: self pollination

تعداد نتایج: 531903  

Journal: :Mediterranean botany 2022

Gennaria diphylla (Link) Parl. is a terrestrial, inconspicuous green orchid. Its distribution includes the central and western Mediterranean region as well Canary Islands Madeira. Investigations on its pollination biology are scarce. In literature there mentions of autogamy allogamy. Pollination pollen import export were studied Tenerife The investigations showed plays less important role than ...

رضایی, عبدالمجید , عبادی, رحیم , مبلی, مصطفی , منصوری, سید مظفر ,

Because of many small florets and protandry, cross pollination in onion which is a biennial plant, by using polycross method for breeding is suitable and easy. To produce polycross seed, bulbs of 9 self onion genotypes were planted in the shape of equilibrium lattice design for 9 treatments with 10 replications on May 2002. To study some agronomical characteristicss, the polycross seeds produ...

Journal: :Plant Ecology 2022

Abstract Pollination of deceptive orchids has enabled scientists to understand how these species avoid inbreeding depression by reducing the number pollinator visits per inflorescence. In rewarding species, which receive a higher rate plant, geitonogamy is usually and therefore risk increases. this study, we assess breeding system orchid A. coriophora, spatio-temporal changes in its fitness as ...

Journal: :Agronomy 2021

Citrus reproductive biology is complex. One of its characteristic features parthenocarpy that enables seedless fruit production. and self-incompatibility knowledge only partial sometimes discrepant. Increasing such relevant for better managing cultivated varieties improving the selection parents in breeding strategies to recover as mandarins. This work develops an efficient protocol characteriz...

Journal: :American journal of botany 2008
María C Rodríguez-Rodríguez Alfredo Valido

Insular floras, characterized by simple pollination networks, sometimes include novel mutualistic agents such as nonspecialist nectarivores. In this study we confirmed the effective pollination of Isoplexis canariensis by opportunistic nectar-feeding birds in Tenerife, Canary Islands, Spain. This plant is among the ornithophilous species of the Canarian flora that lack past and present speciali...

2014
Anya Reid Robyn Hooper Olivia Molenda Christopher J. Lortie Ernesto Badano He Qiang Fabio Bulleri

The reproductive assurance hypothesis states that self-incompatible female plants must produce twice the number of seeds relative to their self-compatible hermaphroditic counterparts to persist in gynodioecious populations. This is a viable life-history strategy, provided that pollination rates are sufficiently high. However, reduced pollination rates in alpine plants are likely due to climate ...

Journal: :Plant biology 2010
M A Munguía-Rosas V J Sosa M E Jácome-Flores

It has been suggested that there is a geographic dichotomy in the pollination systems of chiropterophilous columnar cacti: in intra-tropical areas they are pollinated almost exclusively by bats, whereas in extratropical areas they are pollinated by bats, birds and bees. However, currently the studies are clumped both taxonomically (mainly Pachycereeae species) and geographically (mainly in the ...

Journal: :Molecular ecology 2004
Vincent Castric Xavier Vekemans

Self-incompatibility systems in plants are genetic systems that prevent self-fertilization in hermaphrodites through recognition and rejection of pollen expressing the same allelic specificity as that expressed in the pistils. The evolutionary properties of these self-recognition systems have been revealed through a fascinating interplay between empirical advances and theoretical developments. ...

Journal: :Biotropica 2021

Patterns in ecology are the products of current factors interacting with history. Nevertheless, few studies have attempted to disentangle contribution historical and factors, such as climate change pollinator identity behavior, on plant reproduction. Here, we separate relative importance processes geographical patterns mating system tree species Curatella americana (Dilleniaceae). Specifically,...

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