Chinese Bulletin of Botany ›› 2022, Vol. 57 ›› Issue (5): 611-622.DOI: 10.11983/CBB22046

• EXPERIMENTAL COMMUNICATIONS • Previous Articles     Next Articles

Physiological and Molecular Response Mechanisms Under Low-temperature Stress in Lavandula angustifolia Leaves

Lin Haijiao, Qu Jiaqi, Liu Yinan, Yuan Zening*()   

  1. Key Laboratory of Aquatic Biodiversity Research of Heilongjiang Provincial, College of Life Science and Technology, Harbin Normal University, Harbin 150025, China
  • Received:2022-03-10 Accepted:2022-05-30 Online:2022-09-01 Published:2022-09-09
  • Contact: Yuan Zening
  • About author:*E-mail:

Abstract: The growth and reproduction as well as quality and yield of Lavandula angustifolia, a valuable aromatic plant, are severely affected by low temperatures. In our previous study, a low-temperature tolerant lavender variety was obtained. This study revealed the physiological and molecular regulatory mechanisms of L. angustifolia in response to cold stress. The relevant cold tolerance genes were mined and analyzed using transcriptomic and bioinformatics approaches. The feasibility of external application of salicylic acid to alleviate -10°C freezing stress was also explored. The results showed that seven genes encoding fatty acid desaturases and transferases (LaFADs), three genes involved in the synthesis of soluble sugars (LaBAM1, LaSS2), 19 genes encoding late embryonic abundant proteins (LaLEAs), and seven genes encoding peroxidases (LaPODs) were found to be up-regulated at low temperatures, directing L. angustifolia to synthesize and accumulate protective substances which maintained membrane stability in response to stress. In addition, salicylic acid pretreatment at 150 mg·L-1 was effective in alleviating freezing damage to plants and could be used as a low-temperature protectant. This study provides a basis for further understanding molecular mechanism of L. angustifolia responding to low-temperature stress.

Key words: Lavandula angustifolia, chilling injury, freezing injury, transcriptomic analysis, late embriogenesis abundant protein (LEA)