Nitrogen Concentration in Subtending Cotton Leaves in Relation to Fiber Strength in Different Fruiting Branches
| Autor: | Zhiguo Zhou, Wenqing Zhao, Jian Li, Yali Meng, Youhua Wang, Xiang-bin Gao |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Sucrose
Agriculture (General) chemistry.chemical_element Plant Science key enzymes and constituents engineering.material Biochemistry cotton nitrogen fiber strength S1-972 chemistry.chemical_compound Food Animals subtending leaf nitrogen concentration Botany Cultivar Fiber Ecology biology food and beverages Fiber strength Nitrogen chemistry engineering biology.protein Sucrose synthase Animal Science and Zoology Fertilizer Agronomy and Crop Science Food Science |
| Zdroj: | Journal of Integrative Agriculture, Vol 12, Iss 10, Pp 1757-1770 (2013) |
| ISSN: | 2095-3119 |
| Popis: | Nitrogen (N) fertilizer experiments were conducted to investigate the optimal subtending leaf N concentration for fiber strength, and its relationship with activities of key enzymes (sucrose synthase and β-1,3-glucanase) and contents of key constituents (sucrose and β-1,3-glucan) involved in fiber strength development in the lower, middle and upper fruiting branches of two cotton cultivars (Kemian 1 and NuCOTN 33B). For each sampling day, we simulated changes in fiber strength, activity of sucrose synthase and β-1,3-glucanase and levels of sucrose and β-1,3-glucan in response to leaf N concentration using quadratic eqs.; the optimal subtending leaf N concentrations were deduced from the eqs. For the same fruiting branch, changes in the optimal leaf N concentration based on fiber development (DPA) could be simulated by power functions. From these functions, the average optimal subtending leaf N concentrations during fiber development for the cultivar, Kemian 1, were 2.84% in the lower fruiting branches, 3.15% in the middle fruiting branches and 3.04% in the upper fruiting branches. For the cultivar, NuCOTN 33B, the optimum concentrations were 3.04, 3.28 and 3.18% in the lower, middle and upper fruiting branches, respectively. This quantification may be used as a monitoring index for evaluating fiber strength and its related key enzymes and constituents during fiber formation at the lower, middle and upper fruiting branches. |
| Databáze: | OpenAIRE |
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