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EFFECTS OF SHOOT INVERSION ON STEM STRUCTURE IN PHARBITIS NIL
Author(s) -
Prasad Tottempudi K.,
Sack Fred D.,
Cline Morris G.
Publication year - 1988
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1988.tb11238.x
Subject(s) - pith , shoot , biology , pharbitis nil , elongation , botany , cell size , horticulture , microbiology and biotechnology , materials science , ultimate tensile strength , metallurgy
The effects of shoot inversion on stem structure over 72 hr were investigated in Pharbitis nil by analyzing cell number, cell length, and the cross sectional areas of cells, tissues, and regions. An increase in stem diameter can be attributed to an increase in both cell number and cross sectional area of pith (primarily) and vascular tissue (secondarily). Qualitative observations of cell well thickness in the light microscope did not reveal any significant effects of shoot inversion on this parameter. The inhibition of shoot elongation was accompanied by a significant decrease in cell length in the pith. The results are generally consistent with an ethylene effect on cell dimensions, especially in the pith.