A comparative study on the effects of strong light stress on the photosynthetic characteristics of the shade plant Camellia petelotii (Merr.) Sealy

Huang, Xin; Qin, Bo; Xia, Shitou; Su, Yi; Wenzhen, Ku; Chen, Renjie; Peng, Keqin

doi:10.1007/s11756-022-01172-x

Cited by 4 publications

(7 citation statements)

References 45 publications

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Section: Methodsmentioning

confidence: 99%

“…In previous trials, the photosynthetic rate of C. petelotii leaves under gradient light intensity were carefully tested, and three light intensities of 700, 300, and 100 µmol•m -2 •s -1 were set in the plant culture room for 7 days, it was found that under strong light stress (700 PAR), the thylakoid morphology is abnormal in the leaves, the antioxidant system is damaged, 300 µmol•m -2 •s -1 is a relatively appropriate growth light condition and that strong light stress (700 µmol•m -2 •s -1 ) causes damage to the photosystem of C. petelotii. (Huang et al, 2022) Therefore three stress-repair trial phases were set up in the CONVIRON CG72 walk-in plant growth chamber, the initial phase at a light intensity of 300 (µmol•m -2 •s -1 ), the stress phase at a light intensity of 700 (µmol•m -2 •s -1 ), and the recovery phase at a light intensity of 300 (µmol•m -2 •s -1 ). The chamber temperature was set to 25°C, with a humidity of 70%.…”

Section: Plant Materialsmentioning

confidence: 99%

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A comparative study on photosynthetic characteristics and flavonoid metabolism between Camellia petelotii (Merr.) Sealy and Camellia impressinervis Chang &Liang

Huang

Qin²,

Lei

et al. 2022

Front. Plant Sci.

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Camellia petelotii (Merr.) Sealy and Camellia impressinervis Chang & Liang belong to the golden subgroup of Camellia (Theaceae). This subgroup contains the yellow-flowering species of the genus, which have high medicinal and ornamental value and a narrow geographical distribution. These species differ in their tolerance to high light intensity. This study aimed to explore the differences in their light-stress responses and light damage repair processes, and the effect of these networks on secondary metabolite synthesis. Two-year-old plants of both species grown at 300 µmol·m-2·s-1 photosynthetically active radiation (PAR) were shifted to 700 µmol·m-2·s-1 PAR for 5 days shifting back to 300 µmol·m-2·s-1 PAR for recovery for 5 days. Leaf samples were collected at the start of the experiment and 2 days after each shift. Data analysis included measuring photosynthetic indicators, differential transcriptome expression, and quantifying plant hormones, pigments, and flavonoids. Camellia impressinervis showed a weak ability to recover from photodamage that occurred at 700 µmol·m-2·s-1 compared with C. petelotii. Photodamage led to decreased photosynthesis, as shown by repressed transcript abundance for photosystem II genes psbA, B, C, O, and Q, photosystem I genes psaB, D, E, H, and N, electron transfer genes petE and F, and ATP synthesis genes ATPF1A and ATPF1B. High-light stress caused more severe damage to C. impressinervis, which showed a stronger response to reactive oxygen species than C. petelotii. In addition, high-light stress promoted the growth and development of high zeatin signalling and increased transcript abundance of adenylate dimethylallyl transferase (IPT) and histidine-containing phosphotransferase (AHP). The identification of transcriptional differences in the regulatory networks that respond to high-light stress and activate recovery of light damage in these two rare species adds to the resources available to conserve them and improve their value through molecular breeding.

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Section: Methodsmentioning

confidence: 99%

Section: Plant Materialsmentioning

confidence: 99%

A comparative study on photosynthetic characteristics and flavonoid metabolism between Camellia petelotii (Merr.) Sealy and Camellia impressinervis Chang &Liang

Huang

Qin²,

Lei

et al. 2022

Front. Plant Sci.

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“…Plants 2023, 12, x FOR PEER REVIEW 2 of 15 [9,10]. Due to the limited ability of leaves to store photosynthates, on average, the remaining newly fixed carbon is either consumed in local respiration or exported within 24 h [11].…”

Section: Diurnal Variation In the Gas Exchange Of Leaves Of Different...mentioning

confidence: 99%

“…However, high light can lead to an excess of light energy required for photosynthesis, resulting in a decrease in photosynthesis [6][7][8]. High light can also affect the transportation of photosynthetic assimilates, leading to an increase in the accumulation of assimilates in the source leaves [9,10]. Due to the limited ability of leaves to store photosynthates, on average, the remaining newly fixed carbon is either consumed in local respiration or exported within 24 h [11].…”

Section: Introductionmentioning

confidence: 99%

Diurnal Regulation of Leaf Photosynthesis Is Related to Leaf-Age-Dependent Changes in Assimilate Accumulation in Camellia oleifera

Zhang

Wang

et al. 2023

Plants

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In order to clarify the mechanism of diurnal changes in photosynthesis of leaves of different leaf ages in Camellia oleifera, current-year leaves (CLs) and annual leaves (ALs) were used as the test materials to analyze the diurnal changes in photosynthetic parameters, assimilate contents and enzyme activities, as well as structural differences and expression levels of sugar transport regulating genes. The rate of net photosynthesis in CLs and ALs was highest in the morning. During the day, there was a decrease in the CO2 assimilation rate, and this decrease was greater in ALs than in CLs at midday. The maximal efficiency of photosystem II (PSII) photochemistry (Fv/Fm) showed a decreasing trend as the sunlight intensity increased, but no significant difference between CLs and ALs was found. Compared with CLs, ALs showed a greater decrease in the carbon export rate at midday and the levels of sugars and starch increased significantly in ALs, accompanied by higher enzyme activity of sucrose synthetase and ADP-glucose pyrophosphorylase. In addition, compared with CLs, ALs had a larger leaf vein area and higher leaf vein density, as well as higher expression levels of sugar transport regulating genes during the day. It is concluded that the excessive accumulation of assimilate is an important factor contributing to the midday depression of photosynthesis in Camellia oleifera annual leaves on a sunny day. Sugar transporters may play an important regulatory role in excessive accumulation of assimilate in leaves.

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“…Excessive temperatures and drought may negatively impact enzymes and the growth and survival of microorganisms 26 . High-intensity light stress can result in photo-inhibition and cellular damage 27 , and pressure stress may require specialized equipment. Genetic manipulation can sometimes result in unintended consequences such as alteration of natural traits and also may pose ethical hurdles 28 .…”

Section: Introductionmentioning

confidence: 99%

Optimization of the fermentation media, mathematical modeling, and enhancement of paclitaxel production by Alternaria alternata after elicitation with pectin

Rezazadeh,

Ghanati,

Bonfill

et al. 2024

Sci Rep

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Alternaria alternata fungus is a potent paclitaxel producer isolated from Corylus avellana. The major challenge is the lack of optimized media for endophytic fungi productivity. In the effort to maximize the production of taxoids by A. alternata, several fermentation conditions, including pH (pH 4.0–7.0), different types and concentrations of carbon (fructose, glucose, sucrose, mannitol, sorbitol, and malt extract), and nitrogen (urea, ammonium nitrate, potassium nitrate, ammonium phosphate, and ammonium sulfate) were applied step by step. Based on the results, A. alternata in a medium containing sucrose 5% (w/v) and ammonium phosphate 2.5 mM at pH 6.0 showed a rapid and sustainable growth rate, the highest paclitaxel yield (94.8 µg gFW−1 vs 2.8 µg gFW−1 in controls), and the maximum content of amino acids. Additionally, the effect of pectin was evaluated on fungus, and mycelia harvested. Pectin significantly enhanced the growth and taxoid yield on day 21 (respectively 171% and 116% of their corresponding on day 7). The results were checked out by mathematical modeling as well. Accordingly, these findings suggest a low-cost, eco-friendly, and easy-to-produce approach with excellent biotechnological potential for the industrial manufacture of taxoids.

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A comparative study on the effects of strong light stress on the photosynthetic characteristics of the shade plant Camellia petelotii (Merr.) Sealy

Cited by 4 publications

References 45 publications

A comparative study on photosynthetic characteristics and flavonoid metabolism between Camellia petelotii (Merr.) Sealy and Camellia impressinervis Chang &Liang

A comparative study on photosynthetic characteristics and flavonoid metabolism between Camellia petelotii (Merr.) Sealy and Camellia impressinervis Chang &Liang

Diurnal Regulation of Leaf Photosynthesis Is Related to Leaf-Age-Dependent Changes in Assimilate Accumulation in Camellia oleifera

Optimization of the fermentation media, mathematical modeling, and enhancement of paclitaxel production by Alternaria alternata after elicitation with pectin

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