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Molecular Mechanisms of Fruit Development and Quality Formation of Oil...
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Molecular Mechanisms of Fruit Development and Quality Formation of Oil Tea (Camellia oleifera)

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Crop Physiology and Crop Production".

Deadline for manuscript submissions: closed (30 November 2023) | Viewed by 2252

Special Issue Editors

Prof. Dr. Lingyun Zhang

E-Mail Website
Guest Editor
Key Laboratory of Forest Silviculture and Conservation of the Ministry of Education, The College of Forestry, Beijing Forestry University, Beijing 100083, China
Interests: fruit and seed development; fruit quality; abiotic stress
Dr. Yibo Cao

E-Mail Website
Guest Editor
Research & Development Center of Blueberry, Key Laboratory of Forest Silviculture and Conservation of the Ministry of Education, Beijing Forestry University, Beijing 100083, China
Interests: abiotic stress; fruit quality; salt stress

Special Issue Information

Dear Colleagues,

Oil tea (Camellia oleifera Abel) is a unique species of woody oil tree in China. Tea oil is characterized by high amounts of unsaturated fatty acids, with more than 85 percent oleic acids, which is very healthy for the human body. Chinese oil tea plantations have been expanding continuously in recent years, but with low yields and efficiency. In 2020, the cultivation area of oil tea in China was 71.75 million acres, the production of Camellia seeds was 3.14 million tons, and the production of tea oil was approximately 721,000 tons, with an average yield of only 10 kilograms per acre. The cultivation area of oil tea will reach 90 million acres by 2025, but low yields and low efficiency are important factors limiting the high-quality development of the oil tea industry. In addition, low and high temperature and drought are also important adverse factors for yield formation. Therefore, this Special Issue aims to present high-level, up-to-date research advances covering, but not limited to, flowering, pollination and fertilization, transport of assimilates, developmental properties of fruits and seeds, oil synthesis regulation, yield formation, abiotic resistance, genomics analysis, etc.

Prof. Dr. Lingyun Zhang
Dr. Yibo Cao
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Plants is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Camellia oleifera
  • yield formation
  • fruit and seed development
  • flowering and pollination
  • oil synthesis
  • genomics analysis
  • resistance

Published Papers (2 papers)

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Research

16 pages, 11444 KiB  
Article
Camellia oleifera CoSWEET10 Is Crucial for Seed Development and Drought Resistance by Mediating Sugar Transport in Transgenic Arabidopsis
by Zhihua Ye, Bingshuai Du, Jing Zhou, Yibo Cao and Lingyun Zhang
Plants 2023, 12(15), 2818; https://doi.org/10.3390/plants12152818 - 29 Jul 2023
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Abstract
Sugar transport from the source leaf to the sink organ is critical for seed development and crop yield, as well as for responding to abiotic stress. SWEETs (sugar will eventually be exported transporters) mediate sugar efflux into the reproductive sink and are therefore [...] Read more.
Sugar transport from the source leaf to the sink organ is critical for seed development and crop yield, as well as for responding to abiotic stress. SWEETs (sugar will eventually be exported transporters) mediate sugar efflux into the reproductive sink and are therefore considered key candidate proteins for sugar unloading during seed development. However, the specific mechanism underlying the sugar unloading to seeds in Camellia oleifera remains elusive. Here, we identified a SWEET gene named CoSWEET10, which belongs to Clade III and has high expression levels in the seeds of C. oleifera. CoSWEET10 is a plasma membrane-localized protein. The complementation assay of CoSWEET10 in SUSY7/ura3 and EBY.VW4000 yeast strains showed that CoSWEET10 has the ability to transport sucrose, glucose, and fructose. Through the C. oleifera seeds in vitro culture, we found that the expression of CoSWEET10 can be induced by hexose and sucrose, and especially glucose. By generating the restoration lines of CoSWEET10 in Arabidopsis atsweet10, we found that CoSWEET10 restored the seed defect phenotype of the mutant by regulating soluble sugar accumulation and increased plant drought tolerance. Collectively, our study demonstrates that CoSWEET10 plays a dual role in promoting seed development and enhancing plant drought resistance as a sucrose and hexose transporter. Full article
(This article belongs to the Special Issue Molecular Mechanisms of Fruit Development and Quality Formation of Oil Tea (Camellia oleifera))
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15 pages, 4496 KiB  
Article
Diurnal Regulation of Leaf Photosynthesis Is Related to Leaf-Age-Dependent Changes in Assimilate Accumulation in Camellia oleifera
by Jinshun Zhang, Lingyun Zhang, Qi Wang, Jiali Liu and Yongjiang Sun
Plants 2023, 12(11), 2161; https://doi.org/10.3390/plants12112161 - 30 May 2023
Cited by 1 | Viewed by 1017
Abstract
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 [...] Read more.
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. Full article
(This article belongs to the Special Issue Molecular Mechanisms of Fruit Development and Quality Formation of Oil Tea (Camellia oleifera))
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