Effect of Night Temperature on the Development of Abnormal Embryosacs in Japanese Persimmon ^|^lsquo;Nishimurawase^|^rsquo;
| Autor: | Mitsuo Nakamura, Yoshiaki Wakayama, Hirokazu Fukui |
|---|---|
| Rok vydání: | 1990 |
| Předmět: | |
| Zdroj: | Journal of the Japanese Society for Horticultural Science. 59:59-63 |
| ISSN: | 1880-358X 0013-7626 |
| DOI: | 10.2503/jjshs.59.59 |
| Popis: | In order to clarify the relation between embryosac development and night temperature in Japanese persimmon cv. Nishimurawase, seven trees were covered with plastic films and heated at 20°C with oil heaters. Night heating treatment was performed from 6:00p.m. to 6:00a.m. from 27 April to 15 May. The development of ovaries and embryosacs was accelerated by night heating treatment, which hastened anthesis by 10d compared with control. The following abnormal embryosacs were observed; aborted or degenerated embryosacs, embryosacs with nine or more nuclei, and ovules with two or more (multiple) embryosacs. In control, abortion or degeneration occurred in the embryosacs at the stages from 6.5mm to 9.0mm in ovary diameter and the percentage of this abnormality was 21 at anthesis. In the night heating treatment the abnormality occurred only at a stage of 9.0mm in ovary diameter and was observed in 12% of embryos at anthesis. The occurrence of the other abnormalities was not different between control and the heating treatment, increasing gradually with time after observation, and the abnormalities were 10-20% after the stage of 8.0mm in ovary diameter. Frequency of all abnormalities was 38% at anthesis in control and 24% in the night heating treatment. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|