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!
Abscission - Effects of Plant Growth Regulators
Abscission of leaves and fruit is one of the more obvious characteristics of senescence. Leaves do not fall simply because they are dead. A zone of cell division, the abscission zone, develops near the base of the leaf so that numerous cross walls form at right angles to the long axis of the petiole. Then pectinases and cellulases are induced in these cells of the abscission zone. These dissolve the lamellae of the cross walls of these cells, so that the petiole breaks off, The vascular connections break and usually become plugged by the formation of tyloses (deposits of gummy substances) and layers of corky cells.
Thus, at least two important events are involved in abscission: cell division and the induction of hydrolases. Both of these are processes of active metabolism and must therefore, be a programmed part of the development of the plant. Causes of abscission involve several interlocking events. It seems possible that certain growth-inhibiting substances may be involved. ABA clearly stimulates abscission in cotton petiole explants, as does GA. Addition of auxin to the petiole or blade of a senescing leaf prevents the formation of the abscission layer, and thus inhibits abscission.
Vertical Implant Position: The implant can be submerged in the bone up till the level, where it is surface treated or further embedded till its shoulder, depending upon the sit
Explain brifly what is Genetic Engineering ? Genetic Engineering : Engineering techniques have been used in agriculture and horticulture for centuries. Certain plants or ani
What are the functions of the spleen? Why is a total splenectomy (surgical removal of the spleen) compatible with life? The spleen has many functions: it participates in the de
Chronic Aortic Regurgitation : The aetiological factors leading to aortic regurgitation are: (1) rheumatic, (2) annulo aortic ectasia, (3) native valve endocarditis, (4) c
Bioclimatology: This is the study of effect of climate on distribution of organisms. Bioclimatology is the inter-disciplinary field of science which studies the interactions betwe
Drug Intolerance For patients who cannot tolerate rifampin, alternative regimens include 9-12 months of isoniazid, ethambutol and pyrazinamide, with or without a fluoroquinolo
AMNIOCENTOSI S - Transabdominal aspiration of fluid from the amniotic sac of the foetus is called amniocentesis . It is prenatal diagonestic technique to determine genet
A monohybrid cross: A.Determines the genetic makeup of an organism B.always involves homozygous alleles. C.always involves organisms that are heterozygous at all loci. D.Always inv
Zebrafish are raised in fish tanks with one family per tank. The mutation spadetail is a recessive lethal. A stock tank for spadetail was made by crossing two carriers. The fish in
Coronal disassembly - Coronal restoration in the retreatment phase called coronal deassembling or disassemblying. - Coronal deassembling means removal of coronal and radi
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