Canopy characteristics and light distribution in Sapindus mukorossi Gaertn. are influenced by crown architecture manipulation in the hilly terrain of Southeast China

Gao, Yuan; Gao, Shilun; Jia, Liming; Dai, Tengfei; Wei, Xiaoyi; Duan, Jie; Liu, Shiqi; Weng, Xuehuang

doi:10.1016/j.scienta.2018.05.034

Cited by 23 publications

(19 citation statements)

References 60 publications

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“…In general, better light distribution also means high uniform light intensity. In addition, previous studies also confirmed the importance of light environment for fruit yield and quality [58,59]. In Sapindus mukorossi, Zhang et al [58] concluded that light intensity was the most highly correlated with oil yield among all the microclimate factors.…”

Section: Correlations Between Canopy Microclimates and The Oil Yield mentioning

confidence: 80%

Effects of Tree Shape on the Microclimate and Fruit Quality Parameters of Camellia oleifera Abel

Wen

Yang

et al. 2019

Forests

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Tree shape can affect microclimate, which may directly influence fruit growth and development. Open center and round head are two tree canopy shapes that are generally used in Camellia oleifera Abel. cultivation. To study the effects of the two canopy shapes on the microclimate and fruit quality parameters inside the canopy and investigate the correlations between microclimate and oil yield characteristics, microclimates in different developmental periods and fruit quality parameters at maturity at different positions in the two canopy shapes were determined. In this study, the open-center shape increased the light intensity and temperature, and reduced the relative humidity within the canopy, and the microclimate was more uniformly distributed within the open-center canopy. Fruit quality parameters of open-center canopied trees were also significantly increased and had more uniform distributions, especially the oil yield parameters. The content ratio of the dry seed, oil content ratio of the fresh fruit, and oil yield increased by 43.55%, 59.30% and 79.01%, in the lower layer, respectively, and 27.33%, 41.75%, and 55.43%, in the inner canopy, respectively, compared to those of round-head canopied trees. For both canopy shapes, oil yield parameters had positive correlations with light intensity and temperature, but negative correlations with relative humidity, and the correlation coefficients between light intensity and temperature at different developmental stages and oil yield parameters in round-head canopies were greater than in the open-center canopies. Additionally, regression equations between the single microclimatic factor in different developmental periods and oil yield parameters could be used to estimate the latter in the two canopy shapes. The optimum light conditions for open-center and round-head canopy shapes were 916–1893 and 1108–1259 μmol·m2·s−1, respectively. Overall, the open-center canopy had a more desirable microclimate and a more uniform microclimate distribution, especially the light intensity, which contributes to high uniform fruit quality parameters. Thus, an open-center canopy is the desirable shape in C. oleifera production.

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Section: Correlations Between Canopy Microclimates and The Oil Yield mentioning

confidence: 80%

Effects of Tree Shape on the Microclimate and Fruit Quality Parameters of Camellia oleifera Abel

Wen

Yang

et al. 2019

Forests

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“…Vegetative growth spanned three principal stages at our location in southern China: bud (00-09), leaf (10)(11)(12)(13)(14)(15)(16)(17)(18)(19) and shoot (31)(32)(33)(34)(35)(36)(37)(38)(39) development. The growth cycle of S. mukorossi differed from those of longan and lychee trees in southern China; these latter species have a period of dormancy in winter after completing the growth of shoot and then start the reproductive period in the spring of next year.…”

Section: Discussionmentioning

confidence: 99%

“…Several Chinese provinces (e.g., Fujian, Guizhou, Guangdong, Zhejiang Provinces, China) have planted forests on a large scale as raw material sources, and to facilitate many related enterprises. Programs for genetic analysis and selective improvement of species varieties are currently underway, along with developments in planting techniques, studies of biological characteristics, processing and utilization, and the establishment of a sustainable industrial chain [17][18][19][20].S. mukorossi trees can grow to about 30 m in height.…”

mentioning

confidence: 99%

The Phenological Growth Stages of Sapindus mukorossi According to BBCH Scale

Zhao

Gao

et al. 2019

Forests

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Sapindus mukorossi is a native tree in southern China that has multiple useful functions, including high landscaping, ecological, esthetic, and economic values. More importantly, its fruits are being rapidly developed as raw materials for bioenergy and saponin production in southern China. To provide a standardized phenological description of the species, this study firstly used the BBCH (Biologische Bundesanstalt, Bundessortenamt und CHemische Industrie) scale. In total, eight principal stages-i.e., bud, leaf and shoot development, inflorescence emergence, flowering, fruit development, fruit maturity, senescence and beginning of dormancy-and 58 secondary stages were described. It ranges from vegetative bud dormancy to the onset of the next beginning of the dormancy, using a two-digit numerical coding system. In addition to the descriptions, we provide photographic images of some major developmental stages to standardize morphological characteristics and the phenological observation of S. mukorossi. This study will be an asset for biological researches and cultivation management in Sapindus, and will provide valuable information for other fruit trees. mass of the kernel. Approximately 98% of the oil is stable medium-chain monounsaturated fatty acid, of which oleic and linoleic acids are the major components (>62.5%) [5][6][7][8]. The pericarp is rich in triterpenoid saponins and sesquiterpenoids that are widely used in skin care products, and have been developed as a natural source of surfactants [9][10][11][12]. Recent research shows that these saponins have the functional activities of hepatoprotective effects, anticancer proliferation, and killing sperm; they are also used for herbicidal and antioxidant [13][14][15][16]. These excellent properties make S. mukorossi an attractive candidate for further forest development. The species has been included in a Chinese national forestry biomass energy development project that will apply from 2011 to 2020. Several Chinese provinces (e.g., Fujian, Guizhou, Guangdong, Zhejiang Provinces, China) have planted forests on a large scale as raw material sources, and to facilitate many related enterprises. Programs for genetic analysis and selective improvement of species varieties are currently underway, along with developments in planting techniques, studies of biological characteristics, processing and utilization, and the establishment of a sustainable industrial chain [17][18][19][20].S. mukorossi trees can grow to about 30 m in height. They bloom at 4-5 years after seedlings have been planted. The inflorescence is a large terminal panicle growing in a sequence of 1, 2, 3 side axes on the primary axis. The floret is bisexual; each inflorescence contains small functional male and female flowers, which are light yellow to white-and each has five calyxes, five petals, eight stamens, and an ovary comprising 3-5 carpels. Functional male flowers usually bloom before females, although this sequence is sometimes reversed. The main pollinators are species of bees, flies, and butte...

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“…It is clear that shoot length cannot influence plant source-sink allocation and transport abilities. This suggests that the shoot-cutting and training method can be used in soapberry pruning, not for nutrient transfer but to regulate apical dominance and light distribution, especially in most soapberry feedstock forests in light-limited areas [21].…”

Section: Leaf (Source) and Fruit (Sink) Exchange In Response To Diffementioning

confidence: 99%

“…The research site was located in Jianning County, Fujian Province (116° 35'~117° 04'E, 26° 30'~27°0 6'N), where the elevation ranges from 280 to 858 m, the annual average temperature is 16.5 to 17.5°C, the average rainfall is 1800 mm-2100 mm, the average sunshine duration is 1721 h per year and the relative humidity is 84% [3,21]. The soil parent material is feldspar sandstone, and the soil texture is mostly heavy loam (Cartesian) to light clay (soil layer thickness > 100 cm) [68,69].…”

Section: Experimental Site Description and Experimental Materialsmentioning

confidence: 99%

Exogenous Sucrose Supply Regulates the Non-Structural Carbohydrate, Endogenous Hormone and Mineral Element Levels before the Flower Blooming and Fruit Abscission Stages in the Biodiesel Tree Sapindus mukorossi Gaertn.

Gao¹,

Yang²,

Gao³

et al. 2020

Preprint

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Background: Nutrient deficiency leads to a high fruit abscission rate in Sapindus mukorossi Gaertn. (Soapberry), which is one of the most widely cultivated biodiesel feedstock forests in China. Exogenous sucrose can provide a solution to nutrient deficiency and fruit abscission, which was applied to whole trees at two stages, 20 days before blooming (DBB stage) and fruit abscission (DBFA stage). Six sucrose concentrations, 0%, 1%, 1.5%, 3%, 5% and 7%, were sprayed three times at a completely randomized block design with 5 replications and 6 treatments. 13CO2 labelling experiments were carried out after the 3 sprayings. Results: (1) In the DBB stage, the 3% treatment significantly increased the inflorescence fructose and glucose contents 1-1.2 times, also resulted in the highest fruit GA3, leaf IAA, fruit IAA and fruit ZT contents, while it decreased the inflorescence ABA from 16 μg/g to 4 μg/g. (2) The 1.5% and 3% treatments significantly increased the carbohydrate content and decreased fruit ABA content to 30%-50% of the control level in the DBFA stage. (3) High-concentration sugar treatment (over 3%) increased the nitrogen, phosphorus, and potassium contents, which decreased the calcium and magnesium contents. (4) The 13C-dispatching ability of the inflorescence was 3 times greater than leaves under high-concentration sugar treatment in the DBB stage. Supplying 1.5% sucrose nearly doubled the allocation capacity in the DBFA stage. (5) The source-sink nutrient migration pathway showed that leaf and fruit sugars were directly correlated via phosphorus. Fruit fructose and glucose contents affected the leaf mineral element contents. Conclusions: It can conclude that exogenous application of 3% sucrose in the DBB stage and 1.5% sucrose in the DBFA stage can increase the sink nutrition allocation capacity, and phosphorus is the main mineral element correlated with leaf and fruit sugars.

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Canopy characteristics and light distribution in Sapindus mukorossi Gaertn. are influenced by crown architecture manipulation in the hilly terrain of Southeast China

Cited by 23 publications

References 60 publications

Effects of Tree Shape on the Microclimate and Fruit Quality Parameters of Camellia oleifera Abel

Effects of Tree Shape on the Microclimate and Fruit Quality Parameters of Camellia oleifera Abel

The Phenological Growth Stages of Sapindus mukorossi According to BBCH Scale

Exogenous Sucrose Supply Regulates the Non-Structural Carbohydrate, Endogenous Hormone and Mineral Element Levels before the Flower Blooming and Fruit Abscission Stages in the Biodiesel Tree Sapindus mukorossi Gaertn.

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