Elevated CO2 increases wheat cer, leaf and tiller development, and shoot and root growth
| العنوان: | Elevated CO2 increases wheat cer, leaf and tiller development, and shoot and root growth |
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| المؤلفون: | G. S. McMaster, J. A. Morgan, D. L. Hendrix, D. R. LeCain, L. Aiguo |
| المصدر: | Journal of Agronomy and Crop Science. 183:119-128 |
| بيانات النشر: | Wiley, 1999. |
| سنة النشر: | 1999 |
| مصطلحات موضوعية: | Canopy, Phenology, fungi, food and beverages, Tiller (botany), Plant Science, Biology, Photosynthesis, Agronomy, Dry weight, Photosynthetic acclimation, Shoot, Poaceae, Agronomy and Crop Science |
| الوصف: | Whole-plant responses to elevated CO 2 throughout the life cycle are needed to understand future impacts of elevated atmospheric CO 2 . In this study, Triticum aestivum L. leaf carbon exchange rates (CER) and carbohydrates, growth, and development were examined at the tillering, booting, and grain-filling stages in growth chambers with CO 2 concentrations of 350 (ambient) or 700 (high) μmol mol -1 . Single-leaf CER values measured on plants grown at high CO 2 were 50% greater than those measured on plants grown at ambient CO 2 for all growth stages, with no photosynthetic acclimation observed at high CO 2 . Leaves grown in high CO 2 had more starch and simple sugars at tillering and booting, and more starch at grain-filling, than those grown in ambient CO 2 . CER and carbohydrate levels were positively correlated with leaf appearance rates and tillering (especially third-, fourth- and fifth-order tillers). Elevated CO 2 slightly delayed tiller appearance, but accelerated tiller development after appearance. Although high CO 2 increased leaf appearance rates, final leaf number/culm was not effected because growth stages were reached slightly sooner. Greater plant biomass was related to greater tillering. Doubling CO 2 significantly increased both shoot and root dry weight, but decreased the shoot to root ratio. High CO 2 plants had more spikes plant-' and spikelets spike -1 , but a similar number of fertile spikelets spike -1 . Elevated CO 2 resulted in greater shoot, root and spike production and quicker canopy development by increasing leaf and tiller appearance rates and phenology. |
| تدمد: | 1439-037X 0931-2250 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::e0bf340fb0ff1b6866e2705c10db1c7d https://doi.org/10.1046/j.1439-037x.1999.00325.x |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........e0bf340fb0ff1b6866e2705c10db1c7d |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 1439037X 09312250 |
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