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https://irlib.pccu.edu.tw/handle/987654321/44643
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| 題名: | Effects of Salicylic Acid and Calcium Chloride on Heat Tolerance of Poinsettia |
| 作者: | Lin, KH (Lin, Kuan-Hung)
Huang, SB (Huang, Shao-Bo)
Wu, CW (Wu, Chun-Wei)
Chang, YS (Chang, Yu-Sen) |
| 貢獻者: | 生科所 |
| 關鍵詞: | TEMPERATURE STRESS
ROS
THERMOTOLERANCE
ACCUMULATION
EXCRETION
RESPONSES
CULTURES
CELLS
WHEAT
L. |
| 日期: | 2019-03 |
| 上傳時間: | 2019-06-25 13:01:26 (UTC+8) |
| 摘要: | Exogenous application of either salicylic acid (SA) or calcium chloride (CaCl2) to alleviate heat stress has been extensively studied. However, the effects of combined SA and CaCl2 treatment on the heat tolerance of poinsettia have been poorly studied. This study investigated the role of a foliar spray comprising SA and CaCl2 in managing heat tolerance of three poinsettia (Euphorbia pulcherrima Willd.) cultivars, Noel, Winter Rose (WR), and Ice Punch' (IP). Plants were pretreated with SA, CaCl2, or combined SA and CaCl2 and then exposed to a temperature of 42 8C for 1 hour. Changes in the relative injury (RI) percentage, malondialdehyde (MDA) content, and antioxidant enzyme activities were determined. All plants were then placed in an environment-controlled greenhouse for 14 days and evaluated. Lateral bud sprouting (%), new leaf numbers, and phenotypic appearance were recorded. Results revealed that the three poinsettia cultivars varied in their appearance, morphological growth patterns, and ability to tolerate high-temperature stress. Plant growth of 'Noel' was more robust than that of 'WR' and 'IP', which were considerably affected by heat stress, resulting in brown, withered leaves and defoliation. In general, the effects of the combined application of SA and CaCl2 on heat-tolerant 'Noel' were superior to those of individual applications and no treatment (for control groups) in terms of the RI percentage, lateral bud sprouting (%), and appearance under heat stress. Application of combined SA and CaCl2 for 'Noel' plants was more beneficial for enhancing catalase activity and resulted in the effective alleviation of decreased malondialdehyde content under heat stress. Treatment including 200 m. SA and 10 mM CaCl2 may alleviate heat stress and may prove useful in breeding programs focused on improving poinsettia cultivars. |
| 關聯: | HortScience Volume 54: Issue 3 p.499–504 |
| 顯示於類別: | [生命科學系] 期刊論文
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