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COMPARATIVE ENZYME DIFFERENTIATION IN GRASS ROOTS. I. ACID PHOSPHATASE
Author(s) -
Avers Charlotte J.,
Grimm Robert B.
Publication year - 1959
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.1537-2197.1959.tb07002.x
Subject(s) - biology , epidermis (zoology) , hairless , acid phosphatase , enzyme , botany , root hair , phosphatase , biochemistry , microbiology and biotechnology , anatomy , gene
A vers , C harlotte J. (U. Miami, Coral Gables, Fla.), and R obert B. G rimm . Comparative enzyme differentiation in grass roots. I. Acid phosphatase. Amer. Jour. Bot. 46(3) : 190‐193. Illus. 1959.—There is a correlation between the pattern of acid phosphatase activity and the particular morphogenetic pattern in the root epidermis of festucoid and panicoid grasses. Four festucoid species all showed intensified enzyme activity in trichoblasts and loss of activity in hairless cell initials prior to the maturation of these cells. The 3 panicoid grasses showed no phosphatase‐inactive cells during epidermal development. The festucoid epidermis contains alternating long and short cells which differentiate into hairless and hair cells respectively. The panicoid type shows no such cellular pattern and any epidermal cell seems capable of producing a root hair. Treatment of Phleum roots with 10 ‐4 M coumarin caused a foreshortening of the growth zones and a concurrent apical shift in differential acid phosphatase activity. This response was interpreted as further evidence of a direct correlation between the morphogenetic and enzymatic differentiations in the root epidermis.