Abstract
Actual heterogeneity of indicators of water balance was studied on tissue segments from leaves ofBrassica oleracea L. v.acephala andNicotiana tabacum L. under controlled conditions. Maximal values of transpiration rate, water absorption rate, water transport rate and low values of WSD at the same time were observed at an initial WSD of 0% in segments from middle leaves and at an initial WSD of 20% mostly in segments from upper leaves. Although the properties of leaf tissue itself were probably the basic factors determining the actual heterogeneity of indicators of water balance, without connection with all other factors (e. g. various microclimates, supply of water) heterogeneity did not appear to a full degree.
Abstract
Okamžitá heterogenita některých ukazatelů vodní bilance byla studována na segmentech listového pletiva krmné kapusty a tabáku při konstantních vnějších podmínkách. Maximální hodnoty transpirace, absorpce vody, rychlosti transportu vody a současně nízké hodnoty VSD byly při počátečním deficitu 0% zjištěny u středních listů, při počátečním deficitu 20% však spíše u horních listů. Vnitřní vlastnosti listového pletiva byly sice pravděpodobně základními faktory určujícími okamžitou heterogenitu ukazatelů vodní bilance, ale bez spojení se všemi ostatními faktory (např. rozdílné mikroklima, zásobení vodou) heterogenita se neprojevila v plném rozsahu.
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Address: Flemingovo nám. 2, Praha-6, Czechoslovakia.
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Pospíšilová, J. Water balance of tissue segments from leaves of different insertion levels. Biol Plant 13, 193–199 (1971). https://doi.org/10.1007/BF02933636
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DOI: https://doi.org/10.1007/BF02933636