Results 111 to 120 of about 4,210 (259)

Aerospace medicine and biology: A continuing bibliography with indexes, supplement 128, May 1974 [PDF]

open access: yes
This special bibliography lists 282 reports, articles, and other documents introduced into the NASA scientific and technical information system in April ...

core   +1 more source

Are tetraploids more successful? Floral signals, reproductive success and floral isolation in mixed-ploidy populations of a terrestrial orchid [PDF]

open access: yes, 2017
Background and Aims Polyploidization, the doubling of chromosome sets, is common in angiosperms and has a range of evolutionary consequences. Newly formed polyploid lineages are reproductively isolated from their diploid progenitors due to triploid ...
Gross, Karin, Schiestl, Florian P.
core  

Pollinator availability, mating system and variation in flower morphology in a tropical savanna tree

open access: yesActa Botânica Brasílica
Widely distributed organisms face different ecological scenarios throughout their range, which can potentially lead to micro-evolutionary differentiation at specific localities.
André Rodrigo Rech   +3 more
doaj   +1 more source

Pollination Ecology of Castilleja in Mount Rainer National Park [PDF]

open access: yes, 1972
Author Institution: Department of Botany, University of Michigan, Ann Arbor, Michigan 48104The pollination ecology of four species of Castilleja was studied in the Berkeley Park- Yakima Park area of Mt.
Duffield, W. James
core  

Pollination boilogy and breeding system of Eugenia discifera Gamble An endangered species of Western Ghats, India. [PDF]

open access: yes, 2015
Knowledge of the pollination biology and breeding systems is very important for understanding the life history of long - lived tree species. In case of endangered species, the information may have implication for conservation practices.
Keshavanarayan, P.   +2 more
core  

Variation of morphology, isozymic and vitamin C content of dragon fruit varieties [PDF]

open access: yes, 2009
Rahmawati B, Mahajoeno E. 2009. Variation of morphology, isozymic and vitamin C content of dragon fruit varieties. Nusantara Bioscience 1: 131-137.
MAHAJOENO, EDWI, RAHMAWATI, BANATI
core   +3 more sources

Estrategia reproductiva de una hierba perenne: Hypoxis decumbens (Hypoxidaceae)

open access: yesRevista de Biología Tropical, 1998
Se estudió la estrategia reproductiva de Hypoxis decumbens L. (Hypoxidaceae), una hierba perenne con flores hermafroditas, para comprobar las relaciones que se establecen entre sistema reproductivo, forma de vida, ambiente, sistema de polinización y ...
Elena Raimúndez U, Nelson Ramirez
doaj  

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