Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Gametophytic Incompatibility
In GSI systems callose deposition is not evident on the stigma but is very conspicuous in the pollen tube. Sometimes the callose deposition occurs even in the germpore, inhibiting pollen germination. In the Poaceae, the rejection reaction is completed within a few minutes after pollination and subsequent rejection or acceptance takes 10 minutes with the exception of Poaceae and Oenothera, the recognition/rejection reaction in GSI system occurs after the pollen tube has grown about two third the length of the style.
Genetically the recognition factor on the male side has been attributed to the male gametophyte; the proteins incorporated during pollen wall development in the intine are involved. Since in GSI systems the rejection reaction is comparatively delayed, is also possible that the synthesis or activation, and release of the recognition substances are also delayed and they occur in the pollen tube. In some species the tubes show reduced level of carbohydrates and starch.
Explain about functions of the lacrimal apparatus. Tear Secretion Aqueous tears are secreted by the main (reflex secretion) and accessory (basic secretion) lacrimal
How is the circulatory system of birds characterized? Birds, as every vertebrate, have a closed circulatory system. The heart is same to the mammalian heart, having four chambe
Behavior Change Communication (BCC) interventions that address diabetes mellitus are designed to promote behaviors that prevent diabetes and complications of diabetes. Behavior cha
Q. What are some prophylactic measures against ascariasis? The major prophylactic measures against ascariasis are: efficient washing of vegetables and other foods base sanitary
Explain Karyotype - Animal Taxonomy? In animals systematic, it is the karyotype, that is the chromosome number and structure which are used quite extensively either separately
Q. What is the parasite that causes giardiasis? How is it transmitted and what are the typical manifestations of the disease? The Giardiasis is a protozoal infection caused by
what is morphological diversity of prokaryotes ans eukaryotes
State the Disorders of sleep The need for sleep varies considerably from one person to another, as well as in the same person at different stages of life. We have all been told
Q. How Tyndallisation used for sterilization? John Tyndall devised a process of sterilisation by steaming for a few minutes at 100 o C on 3-4 successive operations separated by
wHAT IS 10um?
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd