Decoupling of light intensity effects on the growth and development of C3 and C4 weed species through sucrose supplementation
| Autor: | Donald L. Smith, Balakrishnan Prithiviraj, Daniel C. Cloutier, Lianne M. Dwyer, Xiaomin Zhou, Antonio DiTommaso, S. H. Begna, Louis Assemat |
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| Přispěvatelé: | ProdInra, Migration, Biologie et Gestion des Adventices (BGA), Etablissement National d'Enseignement Supérieur Agronomique de Dijon (ENESAD)-Institut National de la Recherche Agronomique (INRA)-Université de Bourgogne (UB) |
| Rok vydání: | 2002 |
| Předmět: |
0106 biological sciences
Sucrose Light Physiology Plant Development Plant Science Biology Photosynthesis Plant Roots 01 natural sciences CHENOPODE [SDV.BV.BOT] Life Sciences [q-bio]/Vegetal Biology/Botanics Chenopodium chemistry.chemical_compound Dry weight Botany Dry matter Malvaceae ComputingMilieux_MISCELLANEOUS 2. Zero hunger Amaranthus Plant Stems fungi food and beverages 04 agricultural and veterinary sciences [SDV.BV.BOT]Life Sciences [q-bio]/Vegetal Biology/Botanics Plants 15. Life on land AMARANTE Plant Leaves Light intensity Horticulture chemistry Seeds Shoot 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Shading Weed 010606 plant biology & botany |
| Zdroj: | Journal of Experimental Botany Journal of Experimental Botany, Oxford University Press (OUP), 2002, 53, pp.1935-1940 |
| ISSN: | 1460-2431 0022-0957 |
| DOI: | 10.1093/jxb/erf043 |
| Popis: | Light availability has a profound effect on plant growth and development. One of the ways to study the effects of light intensity on plant growth and development without the confounding problem of photosynthate availability is sucrose injection/supplementation. A greenhouse experiment was conducted to evaluate the effects of light levels (0% and 75% shade) and sucrose injection (distilled water or 150 g sucrose l(-1)) on three weed species: redroot pigweed (Amaranthus retroflexus L., C4), lambsquarters (Chenopodium album L., C3) and velvetleaf (Abutilon theophrasti Medic., C3). The average total sucrose uptake was 7.6 and 5.9 g per plant for 0% and 75% shading, respectively, representing 47% of the average total weed dry weight. Plants injected with sucrose had greater dry weights and shoot-to-root ratios under both light levels. In spite of sucrose supplementation the reduction in dry matter due to shading was greater for roots and reproductive structures than vegetative shoot tissues, indicating light level regulation of morphological changes resulting in changed C allocation that are independent of photosynthate availability. Dry weights of plants injected with sucrose under 75% shading were not different from distilled water-injected unshaded plants. However, both sucrose-injected and control plants, regardless of their photosynthetic pathways, underwent similar changes in allocation of dry matter and morphology due to shading, suggesting that these effects are strictly due to light intensity and not related to photosynthate availability. |
| Databáze: | OpenAIRE |
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