Growth and Productivity of ‘Consort’ Black Currant Grown under Varying Levels of Artificial Shade

Wolske, Eric; Branham, B. E.; Wolz, Kevin J.

doi:10.21273/hortsci15115-20

Cited by 6 publications

(5 citation statements)

References 26 publications

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“…The results indicated that shaded jujube leaves obtained higher light energy by increasing photosynthetic pigment contents and meanwhile improved photosynthetic phosphorylation activity by reducing the chl a/b ratio [30,31]. However, the decrease in specific leaf weight in jujube leaves indicated that the enhanced capacity for light capture did not compensate for the reduction in leaf photosynthesis caused by shading, which was similar to results from studies of black currant, grape, and cigar tobacco leaves [32][33][34].…”

Section: Shading Increased Photosynthetic Pigment Contents Of Leaves ...supporting

confidence: 76%

Shading Inhibits Sugar Accumulation in Leaf and Fruit of Jujube (Ziziphus jujuba Mill.)

Wang

Ren

et al. 2022

Horticulturae

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Jujube is a characteristic light-demanding fruit tree, but fruit quality is frequently degraded because of the weak light in protected cultivation facilities in south China. In this study, a black shade net was used to set three light intensities artificially: no shading (0%, control, NS), moderate shading (45%, MS), and severe shading (76%, SS) to investigate the effect of low light on sugar metabolism of jujube. Compared with NS, chlorophyll and carotenoid contents in shaded leaves were increased, while specific leaf weight was decreased. A decrease in sucrose content, rather than fructose and glucose, was the main factor affecting sugar content in shaded leaves and fruits. Low expression of ZjSS2 and ZjSS3 inhibited sugar synthesis in shaded leaves, thereby reducing sucrose content by 23.7% in SS leaf than that in NS. Compared with NS, sucrose content in SS fruit was decreased by 58.1%, which was mainly caused by the down-regulated expression of ZjSS2 and ZjSPS1. In conclusion, sugar accumulation in leaf and fruit with shading treatment was suppressed, which was associated with differential transcription levels of related metabolic genes. The study provides new insights into sugar metabolism in leaf and fruit of phototropic plants under low light environments, such as jujube.

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Section: Shading Increased Photosynthetic Pigment Contents Of Leaves ...supporting

confidence: 76%

Shading Inhibits Sugar Accumulation in Leaf and Fruit of Jujube (Ziziphus jujuba Mill.)

Wang

Ren

et al. 2022

Horticulturae

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“…In agroforestry systems, berry shrubs can be planted between the rows of trees, typically coming into production years before the nut trees are yielding heavily. Some species such as black currant ( Ribes nigrum ) can maintain productivity even when the overstory trees are large enough to compete for light (Wolske et al 2021 ). In addition to focusing on shrub species with the greatest potential impacts on chronic diseases, characteristics such as productivity, shade tolerance, adaptability to the area, and low maintenance requirements should be considered when introducing berry shrubs into an agroforestry system.…”

Section: Resultsmentioning

confidence: 99%

Nuts and berries from agroforestry systems in temperate regions can form the foundation for a healthier human diet and improved outcomes from diet-related diseases

Lovell¹,

Krishnaswamy²,

Lin³

et al. 2023

Agroforest Syst

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Agroforestry is a specific type of agroecosystem that includes trees and shrubs with the potential to yield nutrient-rich products that contribute to human health. This paper reviews the literature on the human health benefits of tree nut and berry species commonly associated with agroforestry systems of the United States, considering their potential for preventing certain diet-related diseases. Emphasis is placed on those diseases that are most closely associated with poor outcomes from COVID-19, as they are indicators of confounding health prognoses. Results indicate that tree nuts reduce the risk of coronary heart disease, and walnuts (Juglans species) are particularly effective because of their unique fatty acid profile. Berries that are grown on shrubs have the potential to contribute to mitigation of hypertension, prevention of Type II diabetes, and reduced risk of cardiovascular disease. To optimize human health benefits, plant breeding programs can focus on the traits that enhance the naturally-occurring phytochemicals, through biofortification. Value-added processing techniques should be selected and employed to preserve the phytonutrients, so they are maintained through the point of consumption. Agroforestry systems can offer valuable human health outcomes for common diet-related diseases, in addition to providing many environmental benefits, particularly if they are purposefully designed with that goal in mind. The food system policies in the U.S. might be reoriented to prioritize these food production systems based on the health benefits.

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“…In 2018, all treatments reached peak ripeness similarly and were harvested on July 6th. For more information on methods and results relating to the yield and phenology of this study consult [ 22 ]. Subsamples of 300 berries per bush were removed for analysis.…”

Section: Methodsmentioning

confidence: 99%

“…Currants occur naturally in understory environments and are known to produce and grow well under shaded conditions [ 19 , 20 , 21 ]. The growth and productivity of black currants was maintained in up to 65% shade as found by [ 22 ]. Previous research on black currant berry quality in response to shade has shown a reduction in berry sucrose and glucose sugars, with an increase in citric acid in deep shade [ 19 ].…”

Section: Introductionmentioning

confidence: 90%

Berry Quality and Anthocyanin Content of ‘Consort’ Black Currants Grown under Artificial Shade

Wolske

Chatham

Juvik

et al. 2021

Plants

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The effect of artificial shade on berry quality parameters for the field-grown black currant cultivar ‘Consort’ were investigated over two growing seasons in Urbana, Illinois. Four shade treatments reduced photosynthetically active radiation (PAR) from 37 to 83%. Shade had no effect on soluble solids in up to 65% PAR reduction but decreased 11% in 83% shade in one of two years. Shade increased titratable acidity up to 23% in both years. The effect of shade on anthocyanin content revealed greater variation between years than treatments. Shade influence on anthocyanin content was only observed in 2017, when cyanidin derivatives decreased 13–14% from open-sun to 83% shade. Shade did not affect delphinidin derivatives in either year. Environmental factors other than artificial shade may impact black currant berry quality in an understory environment. The results of our study indicate that black currants can maintain berry quality with PAR reductions up to 65%, but some berry quality parameters may decrease when PAR reductions exceed 65% of full sun.

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Growth and Productivity of ‘Consort’ Black Currant Grown under Varying Levels of Artificial Shade

Cited by 6 publications

References 26 publications

Shading Inhibits Sugar Accumulation in Leaf and Fruit of Jujube (Ziziphus jujuba Mill.)

Shading Inhibits Sugar Accumulation in Leaf and Fruit of Jujube (Ziziphus jujuba Mill.)

Nuts and berries from agroforestry systems in temperate regions can form the foundation for a healthier human diet and improved outcomes from diet-related diseases

Berry Quality and Anthocyanin Content of ‘Consort’ Black Currants Grown under Artificial Shade

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