Monoterpene emissions and their protection effects on adult Cinnamomum camphora against high temperature

Xu, Chenyi; Ma, Yahong; Tian, Zhengfeng; Luo, Qian; Zheng, Tiefeng; Wang, Bin; Zuo, Zhaojiang

doi:10.1007/s00468-021-02242-4

Cited by 11 publications

(15 citation statements)

References 50 publications

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“…Compared with high temperature, blocking monoterpene synthesis under high temperature reduced the stomatal conductance in EuL seedlings, but raised the intercellular CO 2 concentration, indicating that the photosynthetic rate reduction with blocking monoterpene synthesis under high temperature is non-stoma limitation. Under high temperature weather, the reduction was also detected in the photosynthetic abilities in the 4 chemotypes of outdoor adult C. camphora with blocking monoterpene synthesis ( Xu et al., 2022 ). This reduction should not only result from the decline of the photosynthetic pigment content, PSII efficiency and assimilatory power, but also result from the decline of CO 2 assimilation abilities, due to the down-regulation of related genes in EuL and CmR ( Figures 5 , 6 ; Supplementary Tables 4, 7 ).…”

Section: Discussionmentioning

confidence: 99%

“…C. camphora is widely cultivated in southern China, an area frequently harmed by high temperature ( Ma et al., 2019 ). In outdoor experiments, ROS accumulation and photosynthetic ability decline were found in the 4 chemotypes of adult C. camphora with inhibiting monoterpene synthesis under high temperature weather ( Xu et al., 2022 ). Similar results were also found in indoor seedlings of EuL under high temperature, suggesting that monoterpene emission is beneficial to the plant tolerating high temperature ( Zuo et al., 2017 ).…”

Section: Introductionmentioning

confidence: 99%

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The uppermost monoterpenes improving Cinnamomum camphora thermotolerance by serving signaling functions

Wang

Luo

et al. 2022

Front. Plant Sci.

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Terpenes serve important functions in enhancing plant thermotolerance. Cinnamomum camphora mainly has eucalyptol (EuL), camphor (CmR), linalool (LnL) and borneol (BeL) chemotypes basing on the uppermost monoterpenes. To reveal the thermotolerance mechanisms of these uppermost monoterpenes (eucalyptol, camphor, linalool, and borneol) in C. camphora, we surveyed the ROS metabolism and photosynthesis in the 4 chemotypes fumigated with the corresponding uppermost monoterpene after fosmidomycin (Fos) inhibiting monoterpene synthesis under high temperature at 38°C (Fos+38°C+monoterpene), and investigated the related gene expression in EuL and CmR. Meanwhile, the thermotolerance differences among the 4 uppermost monoterpenes were analyzed. In contrast to normal temperature (28°C), ROS levels and antioxidant enzyme activities in the 4 chemotypes increased under 38°C, and further increased in the treatment with Fos inhibiting monoterpene synthesis at 38°C (Fos+38°C), which may be caused by the alterations in expression of the genes related with non-enzymatic and enzymatic antioxidant formation according to the analyses in EuL and CmR. Compared with Fos+38°C treatment, Fos+38°C+monoterpene treatments lowered ROS levels and antioxidant enzyme activities for the increased non-enzymatic antioxidant gene expression and decreased enzymatic antioxidant gene expression, respectively. High temperature at 38°C reduced the chlorophyll and carotenoid content as well as photosynthetic abilities, which may result from the declined expression of the genes associated with photosynthetic pigment biosynthesis, light reaction, and carbon fixation. Fos+38°C treatment aggravated the reduction. In contrast to Fos+38°C treatment, Fos+38°C+monoterpene treatments increased photosynthetic pigment content and improved photosynthetic abilities by up-regulating related gene expression. Among the 4 uppermost monoterpenes, camphor showed strong abilities in lowering ROS and maintaining photosynthesis, while eucalyptol showed weak abilities. This was consistent with the recovery effects of the gene expression in the treatments with camphor and eucalyptol fumigation. Therefore, the uppermost monoterpenes can enhance C. camphora thermotolerance as signaling molecules, and may have differences in the signaling functions.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The uppermost monoterpenes improving Cinnamomum camphora thermotolerance by serving signaling functions

Wang

Luo

et al. 2022

Front. Plant Sci.

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Section: Identification Of the Volatile Compoundsmentioning

confidence: 99%

“…The volatile compounds identified in pear flowers are shown in Table 2. A total of ninety-three volatile compounds were identified and quantified in the flowers of seven pear cultivars, including alcohols (15), arenes (6), phenols (3), aldehydes (13), terpenoids (13), ketones (4), heterocycle (1), alkanes (10), and esters (28). Lyubaoshi flower contained the highest number of 52 volatiles, while Golden flower exhibited the least (39 compounds); the other flowers of Bayuesu, Xizilü, Anli, Brown peel, and KorlaXiangli contained 51, 47, 46, 42, and 42 volatile chemicals, respectively.…”

Section: Identification Of the Volatile Compoundsmentioning

confidence: 99%

“…Based on their biosynthetic origin, volatiles can be divided into several classes, including terpenoids, fatty acid derivatives, and amino acid derivatives, involving complex enzymatic reactions [14]. The emission of volatiles is determined not only by genetics but can also be greatly influenced by environmental factors, such as light intensity, temperature, humidity, concentrations of CO 2 and O 3 , and nutrient status [15][16][17]. The studies of flowers mainly focus on the morphology of ornamental aspects [18], however, aromatic properties are often neglected and some important odor-active compounds are gradually lost due to artificial selection and genetic erosion [19].…”

Section: Introductionmentioning

confidence: 99%

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Evaluation and Comparison of Pear Flower Aroma Characteristics of Seven Cultivars

Wang

et al. 2022

Horticulturae

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Due to its ornamental and medicinal value, pear flower has been historically loved and used in China. However, the current understanding of their odor-active compounds and aroma profiles is rather limited. This work aimed to evaluate and compare the overall aroma profile of pear flowers; the volatiles in flowers of seven pear cultivars (Anli, Bayuesu, Golden, Brown peel, KorlaXiangli, Lyubaoshi, Xizilü) were analyzed using solid-phase microextraction–gas chromatography-mass spectrometry (SPME-GC-MS). A total of 93 volatile compounds were identified and quantified within the amount of volatiles in the range of 62.7–691.8 μg kg−1 (FW) and showed high and significant variability in different cultivars. Anli and Brown peel flowers showed a relatively higher volatile abundance, while KorlaXiangli flowers were significantly lower than other cultivars. Although the composition of volatiles depended on the existence of different chemical classes, the odor activity values (OAVs) and odor descriptions showed some aldehydes were part of their main peculiarities and were considered as the basic active odorants that presented strong intensity of citrus and floral odor. Moreover, multivariate analysis showed the pear flower of different cultivars could be arranged in different clusters by the identified odorants. This study provides first-hand knowledge regarding pear flower aroma profiles, and that the cultivar differences were critical for the overall pattern.

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Relationship between somatic embryogenesis and endogenous hormones of Cinnamomum camphora L.

Guo,

Kang,

Yuan

et al. 2024

Plant Cell Tiss Organ Cult

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Monoterpene emissions and their protection effects on adult Cinnamomum camphora against high temperature

Cited by 11 publications

References 50 publications

The uppermost monoterpenes improving Cinnamomum camphora thermotolerance by serving signaling functions

The uppermost monoterpenes improving Cinnamomum camphora thermotolerance by serving signaling functions

Evaluation and Comparison of Pear Flower Aroma Characteristics of Seven Cultivars

Relationship between somatic embryogenesis and endogenous hormones of Cinnamomum camphora L.

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