Physiological and Dry Matter Characteristics of Spring Maize in Northeast China under Drought Stress
| Autor: | Fu Cai, Ying Meng, Ling-Yun Gao, Peng Jiang, Tian-Hong Zhao, Zi-Qi Zhao |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Drought stress Irrigation lcsh:Hydraulic engineering Geography Planning and Development Average level Aquatic Science Biology Photosynthesis 01 natural sciences Biochemistry photosynthesis and transpiration tasseling period lcsh:Water supply for domestic and industrial purposes yield component jointing period lcsh:TC1-978 Dry matter Water Science and Technology Transpiration lcsh:TD201-500 drought stress Sowing Grain number 04 agricultural and veterinary sciences Agronomy 040103 agronomy & agriculture dry matter 0401 agriculture forestry and fisheries 010606 plant biology & botany |
| Zdroj: | Water Volume 10 Issue 11 Water, Vol 10, Iss 11, p 1561 (2018) |
| ISSN: | 2073-4441 |
| DOI: | 10.3390/w10111561 |
| Popis: | This paper examined impacts of drought on both physiological and dry matter characteristics of spring maize grown in Liaoning, China in 2016. We compared responses of dry matters of various parts, yield components, leaf photosynthesis, and transpiration to four drought levels: RD (no drought treatment), D1 (drought treatment between the 38th and 65th day after sowing), D2 (drought treatment between the 38th and 79th day after sowing), and D3 (drought treatment between the 53rd and 93rd day after sowing). Results indicate that the long-term drought in either jointing period or tasseling period had a severer impact on the dry matters and yield components than the short-term drought in jointing period. Moreover, the dry matters and the corresponding partitioning coefficients of different parts were distinct. The yield reduction was caused by the decreases of ear length and bald tip ratio during the short-term drought at jointing period, while it was caused by the reductions of ear length, ear diameter, and grain number per spike during the long-term drought in jointing and tasseling periods. Responses of leaf photosynthesis and transpiration to drought were lagging, but reactions of tasseling drought were faster. Leaf photosynthesis and transpiration after a short-term drought in jointing period could recover to an average level but that after the long-term drought in either jointing or tasseling period could not, after irrigation. |
| Databáze: | OpenAIRE |
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