Factors inducing leaf tip burn on Chinese chive cultivated during the winter
2020
Yasuoka, Y. | Itokawa, S. | Hayami, Y. | Wada, E. | Hashimoto, I.
Chinese chive cultivated in winter may exhibit leaf tip burn symptoms on the first and second upper leaves, with yellowing and increased anthocyanin levels. These symptoms, which were thought to be due to cold injury (chilling stress), were facilitated by a carbon dioxide treatment. However, even after the carbon dioxide application, the symptoms were suppressed by increasing the temperature in the greenhouse to 10℃ at night or in the early morning (from 6:00 am). This injury was also suppressed by shading, but the protective effect was accompanied by a decrease in yield. Under conditions that promote leaf tip burn, the sugar and nitrogen concentrations in leaves increased and decreased, respectively. The opposite phenomena occurred under conditions that are not conducive for leaf tip burn. Thus, sugar and nitrogen concentrations may influence the development of this injury.
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