We are analyzing https://link.springer.com/article/10.1007/s004970050083.

Title:
Sex organ determination and differentiation in the dioecious plant Melandrium album (Silene latifolia): a cytological and histological analysis | Plant Reproduction
Description:
Melandrium album (Silene alba) is a dioecious plant with heteromorphic sex chromosomes (XY system). Sexual dimorphism is a result of developmental blocks in male or female reproductive organ formation within young bipotential flower buds. Progress in understanding the genetic and molecular mechanisms controlling sex determination in this species relies on a detailed description of developmental timing in the two sexes, with emphasis on those early stages during which sexual dimorphism is established. We used a combination of histological and scanning electron microscopy analysis to refine the comparative study and description of the staging of male compared to female flower development. We show that (1) female dimorphism results from modifications in flower meristem organisation, namely a sudden arrest of cell divisions in whorl 4 of male flowers at the time when meristem partitioning is achieved between whorls 3 and 4, and (2) male dimorphism is part of the stamen differentiation process corresponding to stamen arrest at the early sporogenous stage in female flowers. Thus, Melandrium is a natural double ”mutant” that is affected in very early and distinct processes of reproductive organ differentiation. Our results are used to discuss the most likely nature of the specific functions controlling sexual dimorphism in Melandrium.
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Keywords {🔍}

plant, article, sex, sexual, melandrium, dimorphism, access, privacy, cookies, content, organ, determination, differentiation, dioecious, male, female, analysis, information, publish, search, reproduction, album, flowers, data, log, journal, research, silene, histological, farbos, oliveira, negrutiu, flower, early, development, nature, open, discover, springer, optional, personal, parties, policy, find, track, latifolia, cytological, cite, isabelle, margarida,

Topics {✒️}

sex-differential reproduction success sex organ determination month download article/chapter female flower development reproductive organ differentiation dioecious plant sex determination heteromorphic sex chromosomes full article pdf privacy choices/manage cookies sexual dimorphism female dimorphism results ciencias de lisboa stamen differentiation process plant anatomy female flowers european economic area natural double ”mutant” related subjects e-mail armand flower meristem organisation check access instant access conditions privacy policy margarida oliveira accepting optional cookies early sporogenous stage portugal bloco c2 article farbos journal finder publish article log ioan negrutiu male flowers isabelle farbos article cite male dimorphism histological analysis privacy policy personal data books a usage analysis optional cookies information manage preferences subscription content similar content data protection essential cookies cookies skip meristem partitioning

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         headline:Sex organ determination and differentiation in the dioecious plant Melandrium album (Silene latifolia): a cytological and histological analysis
         description: Melandrium album (Silene alba) is a dioecious plant with heteromorphic sex chromosomes (XY system). Sexual dimorphism is a result of developmental blocks in male or female reproductive organ formation within young bipotential flower buds. Progress in understanding the genetic and molecular mechanisms controlling sex determination in this species relies on a detailed description of developmental timing in the two sexes, with emphasis on those early stages during which sexual dimorphism is established. We used a combination of histological and scanning electron microscopy analysis to refine the comparative study and description of the staging of male compared to female flower development. We show that (1) female dimorphism results from modifications in flower meristem organisation, namely a sudden arrest of cell divisions in whorl 4 of male flowers at the time when meristem partitioning is achieved between whorls 3 and 4, and (2) male dimorphism is part of the stamen differentiation process corresponding to stamen arrest at the early sporogenous stage in female flowers. Thus, Melandrium is a natural double ”mutant” that is affected in very early and distinct processes of reproductive organ differentiation. Our results are used to discuss the most likely nature of the specific functions controlling sexual dimorphism in Melandrium.
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      headline:Sex organ determination and differentiation in the dioecious plant Melandrium album (Silene latifolia): a cytological and histological analysis
      description: Melandrium album (Silene alba) is a dioecious plant with heteromorphic sex chromosomes (XY system). Sexual dimorphism is a result of developmental blocks in male or female reproductive organ formation within young bipotential flower buds. Progress in understanding the genetic and molecular mechanisms controlling sex determination in this species relies on a detailed description of developmental timing in the two sexes, with emphasis on those early stages during which sexual dimorphism is established. We used a combination of histological and scanning electron microscopy analysis to refine the comparative study and description of the staging of male compared to female flower development. We show that (1) female dimorphism results from modifications in flower meristem organisation, namely a sudden arrest of cell divisions in whorl 4 of male flowers at the time when meristem partitioning is achieved between whorls 3 and 4, and (2) male dimorphism is part of the stamen differentiation process corresponding to stamen arrest at the early sporogenous stage in female flowers. Thus, Melandrium is a natural double ”mutant” that is affected in very early and distinct processes of reproductive organ differentiation. Our results are used to discuss the most likely nature of the specific functions controlling sexual dimorphism in Melandrium.
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