Open AccessInvestigation about the Necrosis Formation “Sharilka” (Aladja) on the Leaves of Field-Grown Tobacco Plants: Part I. About the Causes of the Phenomenon Part II. BiochemicaI Changes in the “Sharilka”-Affected Leaf
Author(s) -
A. Edreva,
D. Bailov,
S Nikolov
Publication year - 1972
Publication title -
beiträge zur tabakforschung international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.253
H-Index - 16
eISSN - 1612-9237
pISSN - 0173-783X
DOI - 10.2478/cttr-2013-0300
Subject(s) - protoplasm , free water , tobacco leaf , botany , chemistry , water metabolism , cytoplasm , biology , biophysics , biochemistry , environmental science , environmental engineering , agricultural engineering , engineering , endocrinology
A specific dot-like necrosis formation on Oriental type tobacco, called "sharilka'' was studied. The phenomenon is of a physiological nature. It manifests itself under conditions of water excess during the time when the leaves begin to become overripe. It was established that susceptibility to "sharilka" is connected with a low content of pectins and proteins. The latter fact predetermines the lower water binding capacity of protoplasm or higher content of free water in the tissues which suffer from "sharilka''. The raised quantity of free water as a possible source of degenerative cell changes, which become apparent on the leaf in the form of "sharilka", was considered