Physiological Responses of an Aspen-Poplar Hybrid to Air Temperature and Soil Moisture

Domingo, Ireneo L.; Gordon, John C.

doi:10.1086/336750

Cited by 9 publications

(9 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Because of the demonstrated importance of increase in leaf area to early vegetative dry matter production in many plants (24,31,32), it might be asked whether ' growth reductions caused by water deficit at this stage of growth are more closely related to reduced leaf area growth or to reduced carbon dioxide uptake per unit leaf area. Still other experiments have found both reduced leaf area growth and reduced net assimilation rate to be important (13,21,23). Several experiments involving low humidity (14,33) and soil water deficit (2,22,25,28) have found leaf area expansion to be most important to dry weight growth.…”

Section: Introductionmentioning

confidence: 98%

Effects of water stress on leaf expansion, net photosynthesis, and vegetative growth of soybeans and cotton

Bunce¹

1978

Can. J. Bot.

View full text Add to dashboard Cite

BUNCE, J. A. 1978. Effects of water stress on leaf expansion, net photosynthesis, and vegetative growth of soybeans and cotton. Can. J. Bot. 56: 1492-1498. Soybeans and cotton were subjected to humidities from 40 to 80% at 23°C and to soil drought during early vegetative growth under controlled conditions. Measurements were made of leaf water potentials, leaf expansion rates, leaf diffusive resistances to water vapor, and whole-shoot net photosynthesis rates. Net assimilation rates were calculated from harvest data. Low humidity resulted in low leaf water potential and low turgor in all cases and resulted in reduced leaf expansion rates in some, but not all, cases. Low humidity reduced dry weight growth only where leaf expansion rates were reduced. Net photosynthesis rates per unit leaf area were unaffected by low humidity, despite up to 1.5-fold increases in diffusive resistance to water vapor. During soil water stress, leaf expansion rates were reduced 1-2 days before net photosynthesis rates per unit leaf area were reduced, but leaf expansion continued at night after net photosynthesis rates were severely reduced by stress. As a result, the relative importance of leaf area expansion and net assimilation rate to growth in dry weight duringsoil waterstress wasdependent on the degree and duration of stress. BUNCE, J . A. 1978. Effects of water stress on leaf expansion, net photosynthesis, and vegetative growth of soybeans and cotton. Can. J. Bot.56: 1492-1498. Des plants de f6ve soja et de cotton ont etC soumis i une humidite de 40 a 80% a 23"C, ainsi q u ' i un assechement du sol, durant les premieres itapes de la croissance vegetative dans des conditions contr61ees. On a mesure le potentiel hydrique des feuilles, le taux d'expansion des feuilles, la resistance de la feuille i la diffusion de la vapeur d'eau et le taux photosynthetique net des tiges entieres. Les taux nets d'assimilation ont ete calculks d'apres lesdonnees de recoltes. Une faible humidite amene dans tous les cas un faible potentiel hydrique et une faible turgescence dans les feuilleset, danscertainscasseulement, destaux rCduitsd'expansionfoliaire. Une faible humidite amene une diminution de la croissance en poids sec uniquement lorsque le taux d'expansion foliaire diminue. Les taux de photosynthese nette par unite de surface foliaire ne sont pasaffectes par une humidite basse, malgre des augmentations dejusqu'i 1.5 fois de la resistance a ladiffusion de la vapeur d'eau. Durant un stress hydrique dans le sol, le taux d'expansion foliaire diminue 1-

show abstract

Section: Introductionmentioning

confidence: 98%

Effects of water stress on leaf expansion, net photosynthesis, and vegetative growth of soybeans and cotton

Bunce¹

1978

Can. J. Bot.

View full text Add to dashboard Cite

show abstract

“…The temperature used was based on the results of a previous study with clone 5339 (Domingo and Gordon, 1974). Perhaps this temperature was not the physiological optimum for the other two clones used in this work as they were adapted to different areas with differing temperature regimes.…”

Section: Growth Chamber Productivitymentioning

confidence: 99%

“…Particular effort has been made to first define the environmental factors most important in determining yield and to define their relationships to each other and to yield and second to devise methods to select rapidly given clones to best fit these previously defined growing environments, where nitrogen, minerals, and water conditions would be kept in nearoptimum supply. Work at Iowa State University has been done to specify selection criteria based on growth and nitrogen relations (Dykstra, 1972), response to temperature and soil water (Domingo and Gordon, 1974), leaf arrangement and display (Max, 1975), peroxidase activity (Wray, 1974) and rates of photosynthesis and light and dark respiration (Domingo and Gordon, 1974;Gjerstad, 1975 Although differences between the controlled environment and the field were recognized, it was felt that by choosing the proper variables and con trolled environments, field growth potential might be estimated without close simulation of field growth conditions. The ultimate objective of this study was to develop a technique of rapid selection of those clones that might be expected to do best in given field locations by means of a preliminary analysis of selected variables under growth room conditions.…”

Section: Introductionmentioning

confidence: 99%

A comparison of field and growth chamber productivity of three poplar clones

Hennessey

View full text Add to dashboard Cite

“…Growth in height and stem diameter decreased when day and night temperatures exceeded certain maximums (Domingo, 1971) and temperature had an inhibitory effect on growth when it dropped below certain minimums (Downs and Borthwick, 1956).…”

mentioning

confidence: 99%

Indices for the rapid early selection of Populus clones

Zuuring

View full text Add to dashboard Cite

Physiological Responses of an Aspen-Poplar Hybrid to Air Temperature and Soil Moisture

Cited by 9 publications

References 0 publications

Effects of water stress on leaf expansion, net photosynthesis, and vegetative growth of soybeans and cotton

Effects of water stress on leaf expansion, net photosynthesis, and vegetative growth of soybeans and cotton

A comparison of field and growth chamber productivity of three poplar clones

Indices for the rapid early selection of Populus clones

Contact Info

Product

Resources

About