Irrigation with 5°C water and paclobutrazol promotes strong seedling growth in tomato (Solanum lycopersicon)
| Autor: | F. S. Wu, J. J. Chen, Y. W. Sun, M. J. Tseng, W. N. Chang |
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| Rok vydání: | 2010 |
| Předmět: | |
| Zdroj: | The Journal of Horticultural Science and Biotechnology. 85:305-311 |
| ISSN: | 2380-4084 1462-0316 |
| Popis: | SummaryTomato seedlings grown in high-density plug trays are often weak, with excessively elongated stems that are easily damaged, and do not survive well when transplanted into the field. To alleviate this problem, we found that overhead irrigation with 5°C water at 1 – 2 d intervals produced strong seedlings with shorter and stronger stems, increased root and shoot dry weights (DW), and elevated levels of chlorophyll. Irrigation with water at 5°C, 10°C, or 15°C showed that 5°C yielded stems with the greatest strength (575 g mm–1) measured with a texture analyser. No significant difference in seedling height was observed with irrigation scheduled at 08.00 h, 13.00 h, or 16.00 h. Stem and growth indices based on the ratios of stem diameter:plant height, and shoot DW:plant height, respectively, indicated that irrigation with 5°C water increased the stem index to 162% and the growth index to 152%, respectively, compared to control (27°C-watered) seedlings. Seedlings were elongated by gibberellin (GA3) treat... |
| Databáze: | OpenAIRE |
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