Studies on the Photosynthetic Characteristics of Chinese Toon

Xu, Kun; Zhang, G.Q.

doi:10.17660/actahortic.2008.769.14

Cited by 2 publications

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“…It can be seen that shading caught improve water use efficiency of seedlings and increased drought resistance ability. This was in agreement with previous reports in other species, such as Cercidiphyllum japonicum (Li et al 2019), Cucumis sativus (Xu et al 1993), oil peony (Cai et al 2016), and Rubus subgenus (Yang et al 2005).…”

Section: Resultssupporting

confidence: 93%

Diurnal Variations of Photosynthesis and Leaf Anatomical Characteristics of Cornus Walteri Wanger Seedlings Under Different Light Regimes

et al. 2023

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Diurnal variations of photosynthesis and leaf anatomical structure characteristics of Cornus walteri seedlings under three light conditions, including L0 (under full light radiation), L1 (under natural tree shade), L2 (under one layer of shading) were studied. Results showed that, Pn under different light regimes showed asymmetric convex linear changes. The variation of Pn under L0 was the strongest; the maximum of Pn appeared at 12:00 AM, that of Gs was so. Photosynthetic Active Radiation (PAR) under L2 was insufficient, so Pn decreased significantly, and the peak was at 10:00 AM. Pn and Gs under L1 changed gently.The daily average sequence of Pn was L0＞L2＞L1 and Ci showed the reverse sequence. Shading had a significant effect on photosynthetic response parameters of Cornus walteri seedlings, which caused a significant decrease of LCP, LSP, and decline of Pnmax，AQY and Rd was so. Under shading, leaves of Cornus walteri seedlings became thinner, thickness of epidermal cells (EP) decreased significantly, thickness of both PT and ST reduced. Cornus walteri was intolerant tree species, which has certain physiological regulation ability to weak light, but severe shading will hinder seedling growing. So it was suggested to raise seedlings under full light, and create a favorable condition for seedlings growing. Bangladesh J. Bot. 52(2): 395-402, 2023 (June)

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Section: Resultssupporting

confidence: 93%

Diurnal Variations of Photosynthesis and Leaf Anatomical Characteristics of Cornus Walteri Wanger Seedlings Under Different Light Regimes

et al. 2023

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“…mandshuricum is grown in high levels of light irradiation even in 100% full sunlight. This contrasts with other skiophyte plants such as Panax ginseng and Panax quinquefolium which could not adapt to 100% full sunlight condition [27,28]. Further physiological investigations are needed to better clarify the mechanisms underlying the adaptation of A. heterotropoides var.…”

Section: Plos Onementioning

confidence: 94%

Effects of light irradiation on essential oil biosynthesis in the medicinal plant Asarum heterotropoides Fr. Schmidt var. mandshuricum (Maxim) Kitag

et al. 2020

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Asarum heterotropoides Fr. var. mandshuricum (Maxim) Kitag (Chinese wild ginger) is an important medicinal herb. Essential oil extracted from its roots is the key ingredient and is mainly composed of phenylpropanoid compounds. As a skiophyte plant, light is a crucial factor for A. heterotropoides var. mandshuricum growth and metabolism. To investigate the effects of light irradiation on the essential oil biosynthesis in A. heterotropoides var. mandshuricum, the plants were cultivated in four light irradiation treatments (100, 50, 24 and 12% full sunlight). The photosynthetic capacity, essential oil content and composition, activities of several enzymes and levels of some secondary metabolites involved in the shikimic acid and cinnamic acid pathways were analyzed. The leaf mass per area, average diurnal net photosynthetic rate, and the essential oil content increased significantly with increasing light intensity. Phenylalanine, cinnamic acid, and p-coumaric acid in the cinnamic acid pathway were at their highest levels in plants cultivated in 100% full sunlight. The highest content of shikimic acid in the shikimic acid pathway was obtained in plants grown in 50% sunlight transmittance. The activity of the enzymes 3-Deoxy-D-arabino-heptulosonate-7-phosphate synthase, phenylalanine ammonia lyase, cinnamate-4-hydroxylase and 4-coumarate:CoA ligase increased proportionally with light intensity. Overall, we conclude that high light irradiation promotes high net photosynthetic rate, high activity of enzymes and high amounts of phenylpropanoid precursor metabolites leading to significant biosynthesis of essential oil in A. heterotropoides var. mandshuricum.

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Studies on the Photosynthetic Characteristics of Chinese Toon

Cited by 2 publications

References 0 publications

Diurnal Variations of Photosynthesis and Leaf Anatomical Characteristics of Cornus Walteri Wanger Seedlings Under Different Light Regimes

Diurnal Variations of Photosynthesis and Leaf Anatomical Characteristics of Cornus Walteri Wanger Seedlings Under Different Light Regimes

Effects of light irradiation on essential oil biosynthesis in the medicinal plant Asarum heterotropoides Fr. Schmidt var. mandshuricum (Maxim) Kitag

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