“…may give a hint as to tho nature of the phenomenon. Iiaines (7) and Uuuiphrios (8) have shown that a weak negalive pressure in the conducting system of exci.sed shoots of Tilia and Acer gives a temporary increase in the transpiration rate. If the experimental lime exceeds V2-1 hour the increase is masked by the following decrease.…”
“…may give a hint as to tho nature of the phenomenon. Iiaines (7) and Uuuiphrios (8) have shown that a weak negalive pressure in the conducting system of exci.sed shoots of Tilia and Acer gives a temporary increase in the transpiration rate. If the experimental lime exceeds V2-1 hour the increase is masked by the following decrease.…”
“…(i) Prepared twigs (Haines, 1936) were kept in water overnight, and during the following day detached leaves were suspended in a fog chamber until no further increases in weight were recorded on an aperiodic balance. This constant weight was taken as the fresh weight of leaves when fully turgid.…”
Section: Structure Of Specialized Epidermal Cellsmentioning
“…l~un ffihrte u. a. auch CEI~-R~-C~u (1936) an, dab es immerhin m5glich ws dab die Wasseri~den reiBen und dadurch ein Teil der Leitungsbahnen seine Funktionsfahigkeit einbfiBt. Auch die neuen Beobaehtungen im Auflieht yon HAINES (1935) an Fraxinqzs zeigen, dab es bei angestrengter sommerlieher Transpiration o~t zu einem ZerreiBen der koh~renten F/~den in einem Teil der GefaBe kommt (bis 50%). Die Transpiration muB dann so weit eingesehr/~nkt werden, dab sie dureh den Wassernachschub noeh gedeekt werden kann.…”
Section: Transpirationsversuche Mit Eingetopren Pflanzenunclassified
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