Review on Rhododendron arboreum - a magical tree

Rawat, Pramod; Kumar, Neha; Bachheti, Rakesh Kumar

doi:10.1007/s13596-017-0289-3

Cited by 20 publications

(11 citation statements)

References 20 publications

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“…Our results (models) can be reliable basis (bench-mark) for further modelling works for small-sized plant individuals of R. arboreum and other species of the similar types in Nepal and other countries. The knowledge contributed by our modelling works and other studies (jACKSon, 1994;rAnjItKAr et al, 2014;DFRS, 2015;RAWAT et al, 2017) will be useful to the managers for the informed decision-making in natural resource management.…”

Section: Discussionmentioning

confidence: 78%

“…(Family Ericaceae), the national flower of Nepal, state tree of Uttarakhand, state flower of Himachal Pradesh and Nagaland (India), known as Lali gurans in Nepali, is a medium sized tree of 7-14 m height (Rawat et al, 2017;Shrestha and Budhathoki, 2012). This is distributed across Nepal, India, Sri Lanka, China, Myanmar, Bhutan, Pakistan and Thailand (Rawat et al, 2017;Ranjitkar et al, 2014). In Nepal, it is distributed from 1500 m to 3300 m, but is more common above 2300 m (Jackson, 1994).…”

Section: Introductionmentioning

confidence: 99%

“…Flowers are used to prepare pickles and produce juices. The species contains several chemical constituents which can be used as medicines for several diseases (Rawat et al, 2017). The dried flowers of this species are very effective in controlling the diarrhea and dysentery (Laloo et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

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A GENERALIZED ABOVEGROUND BIOMASS MODEL FOR JUVENILE INDIVIDUALS OF Rhododendron arboreum (SM.) IN NEPAL

Bahadur¹,

Sharma

Bhandari

2019

CERNE

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Section: Discussionmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

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A GENERALIZED ABOVEGROUND BIOMASS MODEL FOR JUVENILE INDIVIDUALS OF Rhododendron arboreum (SM.) IN NEPAL

Bahadur¹,

Sharma

Bhandari

2019

CERNE

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“…The anti-inflammatory activity of R. arboreum extract under in vitro conditions (Cao et al, 2004;Rawat et al, 2017) could be due to the presence of phytochemicals (flavonoids [hyperin], tannins, saponins, etc.) that have medicinal anti-inflammatory and anti-nociceptive properties (Nisarshy et al, 2013;Rafi et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

PHYTOCHEMICAL COMPOSITION AND BIOLOGICAL ACTIVITIES OF CRUDE EXTRACT FROM FLOWERS AND LEAVES OF Rhododendron arboreum Sm. FROM NORTHERN THAILAND

WINITCHA

Liengprayoon

Suphamitmongkol

et al. 2021

MABJ

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Rhododendron arboreum Sm. has wide applications in food and beverage, medicines, and cosmetics because the plant contains bioactive phytochemical components. In Thailand, other than for horticultural purposes, scant literature describes the potential applications of this Rhododendron species. Phytochemical composition, biological activity, and cell cytotoxicity of R. arboreum Sm. flower petal and leaf extracts were determined. Ethanolic extracts of fresh and dried flower petals (FF and DF, respectively) and dried leaves (DL) of R. arboreum were prepared by maceration with 60% ethanol for 7 days. Extraction yields of both FF and DF were higher than DL (19.22, 16.76, and 8.50% for FF, DF, and DL, respectively). Preliminary qualitative phytochemical screening showed different compositions in diverse plant parts. Saponins and tannins were present in every extract, with anthraquinones detected only in flowers and terpenoids only in leaves. Total phenolic (TPC) and flavonoid contents (TFC) were highest in DL (405.21 mg gallic acid equivalent and 127.30 mg catechin equivalent per g of dry extract, respectively), followed by DF and FF. Antioxidant properties were determined using two radical scavenging assays as 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2-azinobis(3-ethyl-benzthiazoline-6-sulfonic acid (ABTS). Results indicated that all extracts exhibited better inhibitory activity against DPPH radical than ABTS radical as evidenced by lower IC50 range 24.65-48.15 ìg/mL for DPPH and 65.19-76.36 ìg/mL for ABTS, respectively. A positive correlation coefficient between the two antioxidant assays and TPC and TFC of Rhododendron extracts indicated antioxidant potential distributed in both components. No cytotoxicity was recorded in the three extracts, with concentrations less than 500 μg/mL for both 3-(4,5-dimethylthiazol-2yl)-2,5-diphenyltetrazolium bromide (MTT) and CellTiter-Blue® assay. In vitro studiesexhibited dose-dependent and strong anti-melanogenic and anti-inflammatory activities ranging from 50 to 250 μg/mL for FF, DF, and DL. Results identified various bioactive constituents with potential biological activity (antioxidant, antiinflammatory, and anti-melanogenic), while non-cytotoxicity in R. arboreum flower and leaf extracts suggested the possibility of further applications as a functional ingredient in cosmetics.

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“…It shows some characteristics of invasive species and has a high medicinal value that makes the study of its distribution and the impact of climatic and ecological parameters on its growth very important [34]. Not only does this species carry medicinal value, but it is also very highly valued economically [35]. Medicinally, it is found to possess anti-cancer, immunomodulatory, anti-inflammatory, hepatoprotective, antidiabetic, antioxidant, antidiarrheal, adaptogens, antimicrobial, and antinociceptive properties, among others [35].…”

Section: Target Species and Occurrence Datamentioning

confidence: 99%

Integrating Multi-Sensors Data for Species Distribution Mapping Using Deep Learning and Envelope Models

et al. 2021

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The integration of ecological and atmospheric characteristics for biodiversity management is fundamental for long-term ecosystem conservation and drafting forest management strategies, especially in the current era of climate change. The explicit modelling of regional ecological responses and their impact on individual species is a significant prerequisite for any adaptation strategy. The present study focuses on predicting the regional distribution of Rhododendron arboreum, a medicinal plant species found in the Himalayan region. Advanced Species Distribution Models (SDM) based on the principle of predefined hypothesis, namely BIOCLIM, was used to model the potential distribution of Rhododendron arboreum. This hypothesis tends to vary with the change in locations, and thus, robust models are required to establish nonlinear complex relations between the input parameters. To address this nonlinear relation, a class of deep neural networks, Convolutional Neural Network (CNN) architecture is proposed, designed, and tested, which eventually gave much better accuracy than the BIOCLIM model. Both of the models were given 16 input parameters, including ecological and atmospheric variables, which were statistically resampled and were then utilized in establishing the linear and nonlinear relationship to better fit the occurrence scenarios of the species. The input parameters were mostly acquired from the recent satellite missions, including MODIS, Sentinel-2, Sentinel-5p, the Shuttle Radar Topography Mission (SRTM), and ECOSTRESS. The performance across all the thresholds was evaluated using the value of the Area Under Curve (AUC) evaluation metrics. The AUC value was found to be 0.917 with CNN, whereas it was 0.68 with BIOCLIM, respectively. The performance evaluation metrics indicate the superiority of CNN for species distribution over BIOCLIM.

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Review on Rhododendron arboreum - a magical tree

Cited by 20 publications

References 20 publications

A GENERALIZED ABOVEGROUND BIOMASS MODEL FOR JUVENILE INDIVIDUALS OF Rhododendron arboreum (SM.) IN NEPAL

A GENERALIZED ABOVEGROUND BIOMASS MODEL FOR JUVENILE INDIVIDUALS OF Rhododendron arboreum (SM.) IN NEPAL

PHYTOCHEMICAL COMPOSITION AND BIOLOGICAL ACTIVITIES OF CRUDE EXTRACT FROM FLOWERS AND LEAVES OF Rhododendron arboreum Sm. FROM NORTHERN THAILAND

Integrating Multi-Sensors Data for Species Distribution Mapping Using Deep Learning and Envelope Models

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