| 释义 |
hadrome Bot.|ˈhædrəʊm|
[ad. G. hadrom (G. Haberlandt Physiologische Pflanzenanatomie (1884) vii. v. 265), f. Gr. ἁδρ-ός thick, bulky + -ome.]
The conducting tissue of the xylem, excluding fibres.
1898H. C. Porter tr. Strasburger's Text-bk. Bot. 102 Other terms often used to designate the vascular bundles are folio-vascular bundles and mestome. The vascular portion is also termed the xylem or hadrome. 1914M. Drummond tr. Haberlandt's Physiol. Plant Anat. vii. 347 The water-conducting vessels and tracheides constitute..the resistant hadrome portion [of the conducting strand]... The xylem includes the hadrome with its associated wood-fibres... Where..no wood-fibres are developed, xylem is the exact equivalent of hadrome. 1965K. Esau Plant Anat. (ed. 2) xii. 272 The parallel term for the xylem is hadrom, which refers to the conducting part of the xylem..excluding the fibers.
Hence hadroˈcentric a., having the hadrome surrounded by the leptome; ˈhadromal [a. G. hadromal (F. Czapek 1899, in Zeitschr. f. physiol. Chem. XXVII. 163], a hydrolysis product of lignin; para-coniferyl aldehyde, C6H2(OH)(OCH3)CH:CHCHO; ˌhadromyˈcosis, a fungal disease of plants in which the xylem is the part most affected.
1899Jrnl. Chem. Soc. LXXVI. i. 560 A substance termed hadromal has been isolated from different woody tissues; it has the properties of a phenol and of an aldehyde. 1900B. D. Jackson Gloss. Bot. Terms 310/1 Hadrocentric, having the hadrome in the centre surrounded by the leptome. 1914M. Drummond tr. Haberlandt's Physiol. Plant Anat. vii. 349 If the hadrome is central and the leptome peripheral, the bundle may be termed hadrocentric. 1916G. H. Pethybridge in Sci. Proc. Roy. Dublin Soc. XV. 87 The fungus mycelium is, at any rate in the early stages of the disease, confined to the wood vessels..and I, therefore, suggest the word ‘hadromycosis’ for use in this connexion. 1917Nature 22 Feb. 500/2 Plants suffering from the choking of their vessels [by fungi] (hadromycosis). 1928Chem. Abstr. XXII. 399 Czapek's hadromal.., which he considers responsible for the characteristic red color given by wood tissues with phloroglucinol-HCl. 1931Hilgardia V. 197 (title) Verticillium hadromycosis. 1952F. E. Brauns Chem. Lignin iv. 37 Hadromal occurs in wood as a coniferyl aldehyde cellulose ester. 1971G. C. Ainsworth Ainsworth & Bisby's Dict. Fungi (ed. 6) 254 Hadromycosis, a disease of plants in which the pathogen is confined to the xylem, e.g. Verticillium wilt of potato and tomato. |