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Flower development, pollen fertility and sex expression analyses of three sexual phenotypes of Coccinia grandis

Overview of attention for article published in BMC Plant Biology, November 2014
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Title
Flower development, pollen fertility and sex expression analyses of three sexual phenotypes of Coccinia grandis
Published in
BMC Plant Biology, November 2014
DOI 10.1186/s12870-014-0325-0
Pubmed ID
Authors

Amita G Ghadge, Kanika Karmakar, Ravi S Devani, Jayeeta Banerjee, Boominathan Mohanasundaram, Rabindra K Sinha, Sangram Sinha, Anjan K Banerjee

Abstract

Background Coccinia grandis is a dioecious species of Cucurbitaceae having heteromorphic sex chromosomes. The chromosome constitution of male and female plants is 22¿+¿XY and 22¿+¿XX respectively. Y chromosome of male sex is conspicuously large and plays a decisive role in determining maleness. Sex modification has been studied in hypogynous Silene latifolia (Caryophyllaceae) but there is no such report in epigynous Coccinia grandis. Moreover, the role of organ identity genes during sex expression in Coccinia has not been evaluated earlier. Investigations on sexual phenotypes of C. grandis including a rare gynomonoecious (GyM) form and AgNO3 mediated sex modification have added a new dimension to the understanding of sex expression in dioecious flowering plants.ResultsMorphometric analysis showed the presence of staminodes in pistillate flowers and histological study revealed the absence of carpel initials in male flowers. Though GyM plant had XX sex chromosome, the development of stamens occurred in hermaphrodite flowers but the pollens were not fertile. Silver nitrate (AgNO3) application enhanced stamen growth in wild type female flowers like that of GyM plant but here also the pollens were sterile. Differential expression of CgPI could be involved in the development of different floral phenotypes.ConclusionsThe three principle factors, Gynoecium Suppression (SuF), Stamen Promoting Factor (SPF) and Male Fertility (mF) that control sex expression in dioecious C. grandis assumed to be located on Y chromosome, play a decisive role in determining maleness. However, the characteristic development of stamens in hermaphrodite flowers of GyM plant having XX sex chromosomes indicates that Y-linked SPF regulatory pathway is somehow bypassed. Our experimental findings together with all other previous chromosomal and molecular cytogenetical data strongly support the view that C. grandis could be used as a potential model system to study sex expression in dioecious flowering plant.

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Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 38 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
South Africa 1 3%
Unknown 37 97%

Demographic breakdown

Readers by professional status Count As %
Student > Ph. D. Student 7 18%
Student > Master 5 13%
Researcher 4 11%
Student > Postgraduate 3 8%
Other 3 8%
Other 8 21%
Unknown 8 21%
Readers by discipline Count As %
Agricultural and Biological Sciences 21 55%
Biochemistry, Genetics and Molecular Biology 4 11%
Unspecified 2 5%
Chemistry 1 3%
Medicine and Dentistry 1 3%
Other 0 0%
Unknown 9 24%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 29 November 2014.
All research outputs
#18,385,510
of 22,772,779 outputs
Outputs from BMC Plant Biology
#2,083
of 3,237 outputs
Outputs of similar age
#262,129
of 361,884 outputs
Outputs of similar age from BMC Plant Biology
#66
of 94 outputs
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