Sporophytic and gametophytic self-incompatibility, Biology

Sporophytic and Gametophytic Self-Incompatibility

Besides the categories based on morphology, self incompatibility can be further classified into sporophytic or gametophytic types depending on the origin of factors that determine the mating types on the pollen side.

i) Gametophytic self-incompatibility (GSI) is governed by the genotype of pollen (male gametophyte) itself, e.g., Poaceae, Liliaceae, Solanaceae, Fabaceae, and Commelinaceae.

ii) Sporophytic self-incompatibility (SSI) the genotype of the sporophytic tissue which donates the pollen controls the incompatibility process, e.g., Asteraceae, Brassicaceae and Convolvulaceae.

Other characteristics of GSI and SSI systems are described in Table. A correlation has been established between the type of self-incompatibility, pollen cytology, and the site of inhibition. Generally, species that shed pollen at the 2 - celled stage are credited with gametophytic incompatibility (inhibition occurring in style) while those shedding 3-celled pollen show sporophytic incompatibility (zone of inhibition on stigma). Additionally, taxa having dry type of stigma are associated with sporophytic incompatibility whereas those with wet stigma show gametophytic incompatibility. There are a few exceptions to these correlations.

Posted Date: 1/23/2013 5:23:04 AM | Location : United States







Related Discussions:- Sporophytic and gametophytic self-incompatibility, Assignment Help, Ask Question on Sporophytic and gametophytic self-incompatibility, Get Answer, Expert's Help, Sporophytic and gametophytic self-incompatibility Discussions

Write discussion on Sporophytic and gametophytic self-incompatibility
Your posts are moderated
Related Questions
In today's global economy, goods flow from one country to another like never before, allowing the natural capital from one country to be utilized in many other countries. Some have

Suppose that there are six pairs of alleles which control height and that every dominant allele adds 5cm to the stature. Assume also that the average height of an adult (with equal

Complications : IABP can compromise blood flow to the leg at the time of insertion, pumping or after removal of balloon. It may also cause perforation, bleeding, thrombosis, embol

Location of Overgloves - taped to the sides of the mobile cabinets for procedures such as patient examination and charting during non-aerosol producing procedures - on the p

Could any of the following features be useful in a gateway vector; (i) Origin of replication (ii) multiple cloning site (iii) blue/white selection (iv) M13 forward and rev

The atomic number of argon is 18. Will argon tend to form bonds with other elements? Describe your answer. Argon will not tend to form bonds with other elements. With an atomi

What is PCR? How does PCR works? The PCR, polymerase chain reaction, is a method to synthesize many copies of specific regions of a DNA molecule known as target-regions. Its in

Explain Intensity of heart sound? Intensity of S 1, particularly M 1 depends on the position of the bellies of mitral leafets when the LV begins to contract since S 1 is loudes

what is ecology

FUNDAMENTAL CHARACTERS OF EMBRYONIC DEVELOPMENT 1 .       GAMETOGENESIS- Testes & ovaries are collectively called as gonads. Similarly sperms & ova are collectively calle