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Example sentences for: hrww
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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).
Further, that the blue light response of guard cells is independent of chloroplast-driven changes in CO 2 that can also cause stomata to open [ 22 ] . Thus, at an irradiance of 4 μmol m -2s -1during 2°C exposure, it is likely that reduction in foliage water content of northern HRWW cultivars is due to induced stomatal conductance resulting from blue light rather than from a photosynthetic response.
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.
Foliage water content and plant water uptake of northern-selected HRWW genotypes at 2°C
From this limited survey we have demonstrated that FR genotypes of HRWW have reduced foliage water content when acclimated under our laboratory conditions.
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