Pollen size strongly correlates with stigma depth among Pedicularis species.
J Integr Plant Biol
; 58(10): 818-821, 2016 Oct.
Article
em En
| MEDLINE
| ID: mdl-26990321
ABSTRACT
Darwin proposed that pollen size should be positively correlated with stigma depth rather than style length among species given that pollen tubes first enter the stigma autotrophically, then grow through the style heterotrophically. However, studies often show a positive relationship between pollen size and style length. Five floral traits were observed to be correlated among 42 bumblebee-pollinated Pedicularis species (Orobanchaceae) in which stigmas are distinct from styles. The phylogenetic independent contrast analysis revealed that pollen grain volume was more strongly correlated with stigma depth than with style length, consistent with Darwin's functional hypothesis between pollen size and stigma depth.
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MEDLINE
Assunto principal:
Pedicularis
Idioma:
En
Ano de publicação:
2016
Tipo de documento:
Article