AN UNUSUAL HETEROMORPHIC INCOMPATIBILITY SYSTEM. DISTYLY, SELF-INCOMPATIBILITY, POLLEN LOAD AND FECUNDITY IN ANCHUSA OFFICINALIS (BORAGINACEAE)
نویسندگان
چکیده
منابع مشابه
Unusual heterostyly: style dimorphism and self-incompatibility are not tightly associated in Lithodora and Glandora (Boraginaceae).
BACKGROUND AND AIMS Heterostyly is a floral polymorphism characterized by the reciprocal position of stamens and stigmas in different flower morphs in a population. This reciprocal herkogamy is usually associated with an incompatibility system that prevents selfing and intra-morph fertilization, termed a heteromorphic incompatibility system. In different evolutionary models explaining heterosty...
متن کاملSelf-incompatibility and other pollen-pistil interactions.
Self-incompatibility allows plants to recognize and reject pollen from the same plant, thereby reducing inbreeding. Although in most cases self-incompatibility is controlled by a single genetic locus, recent results show that surprisingly complex signal transduction pathways and many players are involved in pollen recognition and rejection.
متن کاملExperimental insights on the function of ancillary pollen and stigma polymorphisms in plants with heteromorphic incompatibility.
Most heterostylous plants possess a reciprocal arrangement of stigmas and anthers (reciprocal herkogamy), heteromorphic self-incompatibility, and ancillary polymorphisms of pollen and stigmas. The topographical complementarity hypothesis proposes that ancillary polymorphisms function in the rejection of incompatible pollen thus promoting disassortative pollination. Here, we test this hypothesis...
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Many flowering plants possess self-incompatibility (SI) systems that prevent inbreeding. In Brassica, SI is controlled by a single polymorphic locus, the S locus. Two highly polymorphic S locus genes, SLG (S locus glycoprotein) and SRK (S receptor kinase), have been identified, both of which are expressed predominantly in the stigmatic papillar cell. We have shown recently that SRK is the deter...
متن کاملSelf-incompatibility
There are several different types of self-incompatibility in different flowering plant species, and there has recently been progress in understanding their molecular genetics by using combined molecular and evolutionary approaches. Questions include the mechanism of self-incompatibility (both the nature of the proteins encoded by the genes and whether incompatibility systems all have separate g...
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ژورنال
عنوان ژورنال: New Phytologist
سال: 1981
ISSN: 0028-646X,1469-8137
DOI: 10.1111/j.1469-8137.1981.tb02348.x