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... more 10.000 glossed keywords and links to more than 100 figures and schemes, about 100 tables etc. can be obtained in addition to this limited INTERNET version either on CD-ROM or in modified design as book by CRC Press, Taylor & Francis Group, Boca Raton, USA

WAHLUND effect: the frequency of homozygotes decreases in the progeny after matings among individuals of two previously isolated subpopulations stat gene meth

water-absorbing capacity: in breadmaking, a high capacity to absorb water is required; this is associated with hard milling texture, high protein content, and the degree of starch damage during the milling process prep

waterlogged: soil saturated with water agr

watermark: the area between the >>> throat and the eye,band, or halo on a daylily blossom hort

water spots: leaf spots which have specifically been caused by water splashing on the leaves; it may denote either a change in tissue color or the white residue which sometimes remains when the water has evaporated hort

water sprout: a shoot arising from a bud located on wood that is not older than one year hort

water table: the highest point in a soil profile where water saturates the soil on a seasonal or permanent basis agr

wax coating: a thin layer covering the stem, leaves, flowers, and fruits of most plants; waxes are manufactured as oily droplets in epidermal cells, from which they migrate to the outer surface of the plant via tiny canalculi in cell walls, and crystallize as rods and platelets; their pattern of deposition is sometimes used as a micromorphological character below the genus level; the wax coating reduces the water transpiration of the plant and is involved in water balance and resistance mechanisms against diseases bot

waxiness: the phenomenon of whitish, powdery, or waxy covering of plant leaves, stems, or flowers bot

waxy hull-less barley (WHB): a barley mutant that is rich in soluble fiber and low in fat content; these characteristics make it a nutritionally valuable ingredient for food products; it has been shown that the soluble fiber, beta-glucan, reduces cholesterol and lowers blood glucose and insulin response following a meal gene

waxy maize: maize that produces kernels in which the starch that is contained within those kernels is at least 99 % amylopectin, versus the average of 72-76 % amylopectin in common starch seed gene

W chromosome - W-Chromosome n: a sex chromosome that is limited to the female sex cyto

weak flour >>> “strong” flour

weathering - Verwitterung f: all the physical, chemical, and biological processes that cause the disintegration of rocks at or near the surface agr

weed - Unkraut n: a plant that occurs opportunistically on land that has been disturbed by human activity or under cultivated land where it competes for nutrients, water, sunlight, or other resources with cultivated plants phyt

weed killer >>> herbicide

weediness: unwanted effects of a plant agr

weeding: remove weeds from the crop stand agr

well stocked: the situation in which a forest stand contains trees spaced widely enough to prevent competition yet closely enough to utilize the entire site fore

Western blot >>> Western blotting

Western blotting: a technique similar to SOUTHERN blotting but for the analysis of proteins instead of DNA biot meth

wet milling: process in which feed material is steeped in water, with or without sulfur dioxide, to soften the grains in order to help separate the kernel’s various components meth agr

wettable powder: refers to a pesticide which has been processed into a powder to be mixed with water and sprayed meth phyt

wheat root nodules - Weizen-Wurzelknöllchen f: a para-nodule in wheat roots, induced chemically by >>> 2-4-D; it iffers from naturally occurring legume nodule agr

whorl: an arrangement of leaves, branches etc., in a circle around a stem or node bot >>> verticilate

whorl stage: the developmental stage of a grass plant prior to the emergence of the inflorescence phys

wick: a length of specially-woven string or similar item with properties that allow capillary action to work; they are often used in self-watering devices hort meth

wide cross >>> wide hybridization

wide hybridization syn wide cross: cross combinations between taxonomically remote species or genera meth

wide hybrids >>> wide hybridization

wide row planting: the method of wide-spaced sowing seeds in multiple rows (e.g., for better selection of young breeding material); or several rows with wide parallel channels for irrigation meth agr

wildlife plantings: agricultural crops specifically planted for wildlife in fields or small forest openings and are sometimes referred to as food plots eco

wild type: the most frequently observed phenotype, or the one arbitrarily designated as “normal” gene >>> Table 35

wilt: a type of disease in which wilting is a principal symptom phyt

wilting point: the percentage of water remaining in the soil when the plants wilt permanently phys

windbreak: a wind barrier of living trees and shrubs maintained for the purpose of protecting the farm home, other buildings, garden, orchard or feedlots agr eco

wind pollination: pollination by wind-borne pollen bot >>> allogamy

wind-row: a loose, continuous row of cut or uprooted plants placed on the surface of the ground for drying to facilitate harvest agr

windthrow: a tree pushed over by wind; windthrows or blowdowns are more common among shallow-rooted species and in areas where cutting has reduced the density of a stand so that individual trees remain unprotected from the force of the wind fore

wing(s): the two expanded parts of the glume in, for example, wheat, which lie on each side of the keel; in general, a membranous or thin and dry expansion or appendage of a seed or fruit bot

winged fruit >>> wing(s)

winnower: a simple device for seed cleaning from weeds and chaff using an air flow seed

winnowing mill >>> winnower

winter annuals: plants from autumn-sown seed that bloom and fruit in the following spring, then die phys >>> winter-type

winter killing >>> killing frost

winter spore >>> teleutospore >>> resting spore

winter-and-spring wheat: facultative growth habit bot

winter-type (of growth habit): plants germinating in autumn, requiring vernalization during the wintertime for flower induction during the following year bot >>> vernalization

witch’s broom: massed outgrowth of branches of woody plants caused by fungi (e.g., by rusts) phyt

withertip: death of the leaf beginning at the tip, usually in young leaves phys

wolf tree: a tree which occupies more space in the forest than its value justifies; usually a tree which is older, larger or more branchy than other trees in the stand fore

working collection: a collection of germplasm kept under short-term storage conditions, commonly used by breeders or researchers meth

world collection of crop plants: a global collection of samples of a species or genera; it is a coordinated activity of several countries and institutions under the IPGRI meth

w/v: weight in volume, as the number of grams of constituent in 100 ml solution meth >>> v/v

© by R. Schlegel 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014

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