Seedling growth rate of 3 subspecies of big sagebrush

Differences in growth rate among 3 subspecies of big sagebrush (basin big sagebrush, mountain big sagebrush, and Wyoming big sagebrush) for mature plants have been reported by a number of workers. Little has been reported on comparisons of seedling growth rate among these 3 subspecies. Results of th...

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Bibliographic Details
Published in:Journal of range management 1990-09, Vol.43 (5), p.432-436
Main Authors: Booth, G.D. (Intermountain Research Station, Forest Service, USDA, Ogden, UT), Welch, B.L, Jacobson, T.L.C
Format: Article
Language:English
Subjects:
ARTEMISIA
ARTEMISIA TRIDENTATA
ARTEMISIA TRIDENTATA SSP. TRIDENTATA
ARTEMISIA TRIDENTATA SSP. VASEYANA
ARTEMISIA TRIDENTATA SSP. WYOMINGENSIS
Canyons
CRECIMIENTO
CROISSANCE
ETAPAS DE DESARROLLO DE LA PLANTA
Forest ecology
Growing media
GROWTH
GROWTH CURVE
GROWTH PERIOD
GROWTH RATE
INDICE DE CRECIMIENTO
LINE DIFFERENCES
Logistic functions
MADURACION
MATURATION
PERIODE DE CROISSANCE
PERIODO DE CRECIMIENTO
PLANT DEVELOPMENTAL STAGES
Plant growth
Plant Physiology
Plants
PLANTULAS
PLANTULE
Range management
Root growth
Seedling growth
SEEDLINGS
STADE DE DEVELOPPEMENT VEGETAL
TAUX DE CROISSANCE
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Summary:Differences in growth rate among 3 subspecies of big sagebrush (basin big sagebrush, mountain big sagebrush, and Wyoming big sagebrush) for mature plants have been reported by a number of workers. Little has been reported on comparisons of seedling growth rate among these 3 subspecies. Results of this study indicated that (1) over an extended period and in a non-water-limiting environment, the rate of seedling growth in Wyoming big sagebrush approached zero and was less than that of seedlings of basin and mountain big sagebrush; (2) basin and mountain big sagebrush continued to have nonnegligible growth rates even at the end of the study; and (3) Wyoming big sagebrush reached its point of maximum growth rate approximately 2 weeks earlier than did the other 2 subspecies. It appears that Wyoming big sagebrush has evolved, placing 2 important growth characteristics under genetic control: (1) the maximum growth rate is attained earlier (when more water is available to sustain such growth) than in the other 2 subspecies, possibly enhancing its ability to survive on xeric sites during the early stages of growth; and (2) top growth produces smaller aboveground parts, enhancing survival after the early stages.
ISSN:0022-409X
2162-2728
DOI:10.2307/3899007