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Example sentences for: hrww
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Foliage water content and plant water uptake of northern-selected HRWW genotypes at 2°C
Thus a differential reduction in foliage water content of FR plants is comparable to that observed in northern and southern-selected HRWW genotypes observed in the field by Martin [ 11 ] and Nass [ 14 ] in late autumn.
Two HRWW cultivars commercially grown in the Great Plains of United States were the primary genotypes investigated: 'Winoka' released in South Dakota [ 23 ] and 'TAM W-101' released in Texas [ 24 ] . According to South Dakota Experiment Station records, Winoka (northern selected) generally has a greater stand survival rank than TAM W-101 (southern selected) in the Northern Great Plains [ 25 ] . Therefore, Winoka was designated as freeze resistant (FR) and TAM W-101 as freeze susceptible (FS), a modification of the "cold resistance" terminology previously reported for HRWW cultivars [ 26 27 2 ] . Water status of four additional northern selected cultivars were also evaluated: 'Norstar' [ 28 ] , 'Rose' [ 29 ] , 'Arapahoe' [ 30 ] , and 'YTO-117,' an experimental line from Montana selected in 1956 (James Berg, personal communication).
If autumn temperatures impede water uptake, causing greater reduction of tissue water content in northern HRWW plants as suggested by Limin and Fowler [ 15 ] , then we hypothesized that less water would be removed from soil at 2°C by northern-selected than by southern cultivars.
In order to determine whether the relationship between foliage water content reduction and plant water uptake was a general phenomenon among other northern-selected HRWW genotypes, four additional HRWW cultivars were studied.
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