Effect of waterlogging at different growth stages on some morphological traits of wheat varieties
| Autor: | Mohammad-Eghbal Ghobadi, Mokhtar Ghobadi, Alireza Zebarjadi |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Chlorophyll
0106 biological sciences Atmospheric Science Rain Health Toxicology and Mutagenesis Winter wheat Biology Plant Roots 01 natural sciences Anthesis Dry weight Triticum Ecology Chlorophyll A Water Plant physiology 04 agricultural and veterinary sciences biology.organism_classification Agronomy Seedlings Seedling Germination Shoot 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Plant Shoots 010606 plant biology & botany Waterlogging (agriculture) |
| Zdroj: | International Journal of Biometeorology. 61:635-645 |
| ISSN: | 1432-1254 0020-7128 |
| DOI: | 10.1007/s00484-016-1240-x |
| Popis: | Excess rainfalls may be the cause of waterlogging in soil, which affects the growth and development of wheat. Therefore, the objectives of this study were to examine the effects of waterlogging on shoot and root growth and physiological characteristics of wheat. Three experiments were conducted: experiment 1 (E1): evaluation of seedling growth on ten Iranian winter wheat varieties with waterlogging periods (1-4, 4-8, 8-12, and 12-16 days starting from seed germination). Seminal roots and plumule were investigated at seedling. The others are E2: pretreatment of waterlogging (15 days) at tillering and stem elongation stages and its effects on shoot and root growth at anthesis stage and experiment 3 (E3): pretreatment of waterlogging (15 days) at tillering and jointing stages and its effects on yield and yield components and also evaluation of stress tolerance indexes. The results of the seedling growth test (E1) showed that 1-4- and 4-8-day waterlogging severity reduced seminal root length (94.5 to 93.7 %) and plumule length (86.2 to 50.0 %) compared to control. Results of E2 indicated that waterlogging stress decreased shoot dry weight, root dry weight, total secondary root length, and chlorophyll a + b content of flag leaf by 28-31, 44-35, 20-31, and 28-35 %, respectively. Also, result of E3 showed that the grain yields of wheat varieties at two conditions of stress were different in base tolerance indexes. In general, the responses of wheat varieties to waterlogging were different at the three experiments. The varieties that had the most of dry weight and length of the root were tolerant. Thus, it is possible to use these characteristics as an index for selecting the varieties with tolerance to waterlogging. |
| Databáze: | OpenAIRE |
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