https://scholars.tari.gov.tw/handle/123456789/20194
Title: | Collaborative expression of FLOWERING LOCUS C in heat-tolerant cauliflower | Authors: | Chen-Yu Lin Ching-Hsiang Hsieh Tzu-Ying Yeh Hsiang-I Lee |
Keywords: | vernalization;curd initiation;high temperature;autonomous pathway | Issue Date: | May-2023 | Publisher: | International Society for Horticultural Science: ISHS | Journal Volume: | 78 | Journal Issue: | 2 | Start page/Pages: | 1-7 | Source: | Fruits | Abstract: | Introduction – Cauliflower (Brassica oleracea var. botrytis) is suitable for growing in a temperate climate and could be grown in tropical or sub-tropical regions in the cool season. Due to the impact of global warming, cauliflower cultivation has become a challenge. At temperatures over 30 °C, the curds show physiological disorders resulting in low quality and economic loss. The study aimed to determine the curd development and FLOWERING LOCUS C (FLC) gene expressions in heat-tolerant and non-heat-tolerant cauliflower, which could provide helpful information for cauliflower selection in the future. Materials and methods – Cauliflower seedlings were treated at 26 °C in growth chambers for two weeks. After the stem apices reached curd initiation, plants were exposed to continuous temperatures of 26, 30, and 34 °C for 5 weeks. BoFLC gene detections were in the 2nd and 4th weeks after temperature treatments. In the 3rd and 5th weeks, apex investigations were conducted by tissue dissection with microscope observation. Results – Cauliflower ‘Winner’ showed heat tolerance at 26 °C and 30 °C, and curd development was induced. BoFLC1, BoFLC2, and BoFLC5 transcript levels decreased after curd initiation. ‘Early 45’ also formed visible curd at 26 °C with decreasing BoFLC1 and BoFLC2 transcript levels and the lowest level of BoFLC5. The high BoFLC1 and BoFLC5 in ‘PI 244664’ acted as a potent inhibitor at the curd development stage at 26–34 °C. Conclusion – BoFLC in heat-tolerant lines might go through a collaborative expression via the non-vernalization pathway and establish an adaptive mechanism at relatively high temperatures (26–30 °C). |
URI: | https://www.pubhort.org/fruits/78/2/8/index.htm https://scholars.tari.gov.tw/handle/123456789/20194 |
ISSN: | 0248-1294 1625-967X |
DOI: | 10.17660/th2023/008 |
Appears in Collections: | SCI期刊 |
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