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Self-incompatibility in a distylous species of Rubiaceae: is there a single incompatibility response of the morphs?
Sex Plant Reprod 2009; 22(3):121-31SP

Abstract

Heterostyly is a genetically controlled floral polymorphism usually associated with an incompatibility system. This set of features is known to occur in several angiosperm families, but some aspects of its biology has not been well studied. The present study investigates cellular aspects of the pollen-pistil interaction after compatible and incompatible pollinations of Psychotria nuda, to increase our knowledge of heteromorphic self-incompatibility (HetSI). The use of bright field, fluorescence and transmission electron microscopy methods allowed us to demonstrate that pollen tubes behave differently after incompatible and compatible pollinations. Pollen tubes were particularly distinct after incompatible pollinations of L- and S-morph flowers. Relative to compatible pollen tubes, incompatible L-morph tubes had a drastic reduction in cellular contents, but no cell rupture. Incompatible S-morph tubes exhibited dense cytoplasm in apical regions, as well as in other regions, accompanied by a rupture of the apex. These results support the hypothesis that L- and S-morph flowers have different incompatibility mechanisms during HetSI.

Authors+Show Affiliations

Centro de Biociências e Biotecnologia (CBB), Universidade Estadual do Norte Fluminense (UENF), Campos dos Goytacazes, RJ, Brazil.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

20033433

Citation

Klein, D E., et al. "Self-incompatibility in a Distylous Species of Rubiaceae: Is There a Single Incompatibility Response of the Morphs?" Sexual Plant Reproduction, vol. 22, no. 3, 2009, pp. 121-31.
Klein DE, Freitas L, Da Cunha M. Self-incompatibility in a distylous species of Rubiaceae: is there a single incompatibility response of the morphs? Sex Plant Reprod. 2009;22(3):121-31.
Klein, D. E., Freitas, L., & Da Cunha, M. (2009). Self-incompatibility in a distylous species of Rubiaceae: is there a single incompatibility response of the morphs? Sexual Plant Reproduction, 22(3), pp. 121-31. doi:10.1007/s00497-009-0097-0.
Klein DE, Freitas L, Da Cunha M. Self-incompatibility in a Distylous Species of Rubiaceae: Is There a Single Incompatibility Response of the Morphs. Sex Plant Reprod. 2009;22(3):121-31. PubMed PMID: 20033433.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Self-incompatibility in a distylous species of Rubiaceae: is there a single incompatibility response of the morphs? AU - Klein,D E, AU - Freitas,L, AU - Da Cunha,M, Y1 - 2009/05/20/ PY - 2008/11/18/received PY - 2009/05/02/accepted PY - 2009/12/25/entrez PY - 2009/12/25/pubmed PY - 2010/3/23/medline SP - 121 EP - 31 JF - Sexual plant reproduction JO - Sex. Plant Reprod. VL - 22 IS - 3 N2 - Heterostyly is a genetically controlled floral polymorphism usually associated with an incompatibility system. This set of features is known to occur in several angiosperm families, but some aspects of its biology has not been well studied. The present study investigates cellular aspects of the pollen-pistil interaction after compatible and incompatible pollinations of Psychotria nuda, to increase our knowledge of heteromorphic self-incompatibility (HetSI). The use of bright field, fluorescence and transmission electron microscopy methods allowed us to demonstrate that pollen tubes behave differently after incompatible and compatible pollinations. Pollen tubes were particularly distinct after incompatible pollinations of L- and S-morph flowers. Relative to compatible pollen tubes, incompatible L-morph tubes had a drastic reduction in cellular contents, but no cell rupture. Incompatible S-morph tubes exhibited dense cytoplasm in apical regions, as well as in other regions, accompanied by a rupture of the apex. These results support the hypothesis that L- and S-morph flowers have different incompatibility mechanisms during HetSI. SN - 1432-2145 UR - https://www.unboundmedicine.com/medline/citation/20033433/Self_incompatibility_in_a_distylous_species_of_Rubiaceae:_is_there_a_single_incompatibility_response_of_the_morphs L2 - https://dx.doi.org/10.1007/s00497-009-0097-0 DB - PRIME DP - Unbound Medicine ER -