Effects of light-regulation and intensity on the growth, physiological and biochemical properties of Aralia elata (miq.) seedlings

Gao, Zhicheng; Muhammad, Khalid; Jan, Farooq; Saeed-ur-Rahman,; Jiang, Xinhong; Yu, Xiaoyan

doi:10.1016/j.sajb.2018.12.008

Cited by 20 publications

(19 citation statements)

References 21 publications

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“…It is well documented that understory are shade-obligate species. Gao et al reported that the 50-65% shading resulted in the highest level of soluble sugars in A. elata leaves (Gao et al 2019). Our study concurs with this judgment by fi nding higher leaf starch accumulation in A. elata individuals under larger canopies.…”

Section: Discussionsupporting

confidence: 91%

“…This merit has been highly valued by developers who has over explored the natural resource of this species. Studies revealed that A. elata can dwell in highly shaded environment with 80% sunlight being shaded off but their growth and biochemical properties performed the best in the 35% of transmittance (Gao et al 2019). Natural A. elata populations tended to distribute at shallow mountains with slopes at less 10° where they were shaded by canopies from complicated tree species and the responses of leaf nutrient and carbohydrate had uncertainty (Wei et al 2019).…”

Section: Introductionmentioning

confidence: 99%

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Foliar nutrient and carbohydrate in Aralia elata can be modified by understory light quality in forests with different structures at Northeast China

Wei

Chen

et al. 2019

Ann. For. Res.

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Section: Discussionsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Foliar nutrient and carbohydrate in Aralia elata can be modified by understory light quality in forests with different structures at Northeast China

Wei

Chen

et al. 2019

Ann. For. Res.

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“…The photosynthetic pigments of plants can selectively absorb spectra of certain wavelengths; Chl a absorbs mainly sunlight, in the red-orange region. Chl b absorbs short-wave light, such as that in the blue region, and a higher content of Chl b may enhance shade tolerance [80]. Carotenoids are accessory pigments that play an essential photoprotective role in chloroplasts [81].…”

Section: Discussionmentioning

confidence: 99%

Morphological and Physiological Responses of Pinus massoniana Seedlings to Different Light Gradients

Wang

et al. 2021

Forests

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Light intensity is a critical factor regulating photosynthetic capacity in plants. However, the effects of varying light intensity on morphological and photoprotective mechanisms in Pinus massoniana seedlings have not been explored in depth, especially those in the first seedling growing season. We measured the growth, photosynthetic physiology, biochemistry, and chlorophyll fluorescence of P. massoniana seedlings at four light gradients: 100% relative irradiance (RI, full sunlight), 70% RI, 50% RI, and 20% RI. The seedling height at 70% RI was 9.27% higher than that at 100% RI. However, seedling height was inhibited under low light intensity; at 20% RI, all seedlings died. The decreasing light intensity inhibited ground diameter growth but increased the height-diameter ratio. The secondary needle emergence rate was 53.4% higher at 70% RI than at 100% RI but was only 2% at 50% RI. The chlorophyll and carotenoid contents increased significantly with decreasing light intensity. The increased Chl b and Car contents promoted the photoreceptor potential of the violet (400~420 nm), blue (440~480 nm), and yellow-orange (597~655 nm) regions in leaves. Among the chlorophyll fluorescence parameters, Fv/Fm, Fv′/Fm′, Y(II), qp, and ETR all reached maximum values at 70% RI but were significantly lower at 50% RI than at 100% RI. However, decreasing the light intensity caused a reduction in NPQ. The 70% RI level increased POD and SOD activity and the contents of osmotic regulation substances and slowed MDA accumulation. Seedlings at 70% RI had a higher growth rate, higher photosynthetic activity and potential, and significantly greater stress resistance than the other seedlings. Therefore, appropriate shading measures were beneficial to the cultivation of vigorous seedlings. Furthermore, spectral reflectance indexes were found to be a suitable tool for monitoring the photosynthetic physiological characteristics, stress resistance characteristics, and growth status of P. massoniana seedlings in real time.

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“…Furthermore, the temperature in Shohael et al varied within the range of indoor conditions from 12 to 30 • C [31], but the real temperature for natural populations was as low as 0-7 • C with annual chilling periods. It was indicated that the temperature at 20 • C was suitable for the development of embryos [14], but this temperature may occur only in summer for some natural populations. However, other botanic studies revealed that low temperature can induce the synthesis of anthocyanin in several plant species [15,18].…”

Section: Discussionmentioning

confidence: 99%

Geographical Distribution and Environmental Correlates of Eleutherosides and Isofraxidin in Eleutherococcus senticosus from Natural Populations in Forests at Northeast China

Guo

Wei

et al. 2019

Forests

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Non-wood forest products (NWFPs) derived from understory plants are attracting attention about sustainable forestry development. Geographical distribution and climate correlates of bioactive compounds are important to the regional management for the natural reserves of medical plants in forests. In this study, we collected Eleutherococcus senticosus individuals from 27 plots to map the special distribution of concentrations of eleutheroside B, eleutheroside E, and isofraxidin in forests of Northeast China. Compound concentrations in both aerial and underground organs were further detected for relationships with the average of 20-year records of temperature, precipitation, and relative humidity (RH). We found higher shoot eleutheroside B concentration in populations in northern and low-temperature regions (R = −0.4394; P = 0.0218) and in eastern and high-RH montane forests (R = 0.5003; P = 0.0079). The maximum-likelihood regression indicated that both RH (Pr > Chi-square, 0.0201) and longitude (Pr > Chi-square, 0.0026) had positive contributions to eleutheroside B concentration in roots, but precipitation had strongly negative contributions to the concentrations of eleutheroside E (Pr > Chi-square, 0.0309) and isofraxidin (Pr > Chi-square, 0.0014) in roots. Both geography and climate factors had effects on the special distribution of medical compounds in E. senticosus plants in natural populations in Northeast China. The management of NWFP plants at the regional scale should consider effects from climatic geography.

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Effects of light-regulation and intensity on the growth, physiological and biochemical properties of Aralia elata (miq.) seedlings

Cited by 20 publications

References 21 publications

Foliar nutrient and carbohydrate in Aralia elata can be modified by understory light quality in forests with different structures at Northeast China

Foliar nutrient and carbohydrate in Aralia elata can be modified by understory light quality in forests with different structures at Northeast China

Morphological and Physiological Responses of Pinus massoniana Seedlings to Different Light Gradients

Geographical Distribution and Environmental Correlates of Eleutherosides and Isofraxidin in Eleutherococcus senticosus from Natural Populations in Forests at Northeast China

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