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Psidium guajava

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https://www.readbyqxmd.com/read/28757558/the-bionomics-of-the-cocoa-mealybug-exallomochlus-hispidus-morrison-hemiptera-pseudococcidae-on-mangosteen-fruit-and-three-alternative-hosts
#1
Murni Indarwatmi, Dadang Dadang, Sobir Ridwani, Endang Sri Ratna
The cocoa mealybug, Exallomochlus hispidus Morrison (Hemiptera: Pseudococcidae) is known to attack mangosteen, an important fruit export commodity for Indonesia. The mealybug is polyphagous, so alternative host plants can serve as a source of nourishment. This study aimed to record the bionomics of E. hispidus on mangosteen (Garcinia mangostana L.) and three alternative hosts, kabocha squash (Cucurbita maxima L.), soursop (Annona muricata, L.), and guava (Psidium guajava L.). First-instar nymphs of the E. hispidus were reared at room temperature on mangosteen, kabocha, soursop, and guava fruits until they developed into adults and produced nymphs...
July 25, 2017: Insects
https://www.readbyqxmd.com/read/28728376/effect-of-condensed-tannins-containing-ficus-infectoria-and-psidium-guajava-leaf-meal-mixture-supplementation-on-nutrient-metabolism-methane-emission-and-performance-of-lambs
#2
A K Pathak, Narayan Dutta, A K Pattanaik, V B Chaturvedi, K Sharma
Objective: The study was conducted to examine the effect of condensed tannins (CT) containing Ficus infectoria and Psidium guajava leaf meal mixture (LMM) supplementation on nutrient metabolism, methane emission and performance of lambs. Methods: Twenty four lambs of ~ 6 months age (average body weight 10.1±0.60 kg) were randomly divided into 4 dietary treatments (CT-0, CT-1, CT-1.5 and CT-2 containing 0, 1.0, 1.5 and 2.0 percent CT through LMM, respectively) consisting of 6 lambs each in a completely randomized design...
June 27, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28727747/plant-species-dispersed-by-galapagos-tortoises-surf-the-wave-of-habitat-suitability-under-anthropogenic-climate-change
#3
Diego Ellis-Soto, Stephen Blake, Alaaeldin Soultan, Anne Guézou, Fredy Cabrera, Stefan Lötters
Native biodiversity on the Galapagos Archipelago is severely threatened by invasive alien species. On Santa Cruz Island, the abundance of introduced plant species is low in the arid lowlands of the Galapagos National Park, but increases with elevation into unprotected humid highlands. Two common alien plant species, guava (Psidium guajava) and passion fruit (Passiflora edulis) occur at higher elevations yet their seeds are dispersed into the lowlands by migrating Galapagos tortoises (Chelonoidis spp.). Tortoises transport large quantities of seeds over long distances into environments in which they have little or no chance of germination and survival under current climate conditions...
2017: PloS One
https://www.readbyqxmd.com/read/28725389/quality-versus-quantity-foraging-decisions-in-the-honeybee-apis-mellifera-scutellata-feeding-on-wildflower-nectar-and-fruit-juice
#4
Kyle Shackleton, Nicholas J Balfour, Hasan Al Toufailia, Roberto Gaioski, Marcela de Matos Barbosa, Carina A de S Silva, José M S Bento, Denise A Alves, Francis L W Ratnieks
Foraging animals must often decide among resources which vary in quality and quantity. Nectar is a resource that exists along a continuum of quality in terms of sugar concentration and is the primary energy source for bees. Alternative sugar sources exist, including fruit juice, which generally has lower energetic value than nectar. We observed many honeybees (Apis mellifera scutellata) foraging on juice from fallen guava (Psidium guajava) fruit near others foraging on nectar. To investigate whether fruit and nectar offered contrasting benefits of quality and quantity, we compared honeybee foraging performance on P...
October 2016: Ecology and Evolution
https://www.readbyqxmd.com/read/28720961/valorizing-guava-psidium-guajava-l-seeds-through-germination-induced-carbohydrate-changes
#5
Cheng Xian Ling, Ying Ping Chang
Guava seeds are produced as a waste product by the guava processing industry. Their high carbohydrate contents may suit the carbohydrate needs of the feed sector but their high dietary fiber content limits their feed value. The feed values of fruit seeds can be improved through germination, which involves the mobilization of nutrients through seed enzymes and alters the seed carbohydrate composition. The changes of selected carbohydrates in guava (Psidium guajava L.) seeds brought by germination to those in red bean (Vigna angularis) and winter wheat (Triticum aestivum L...
June 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28678960/aqueous-extract-of-psidium-guajava-leaves-phenolic-compounds-and-inhibitory-potential-on-digestive-enzymes
#6
Anderson A Simão, Tamara R Marques, Silvana Marcussi, Angelita D Corrêa
Leaves of Psidium guajava L. (guava) have been widely used in the popular way for prevention and treatment of various diseases. Thus, the objective of this study was to evaluate the inhibitory potential of leaves aqueous extract from three cultivars of P. guajava (Pedro Sato, Paluma and Século XXI) on α-amylase, α-glycosidase, lipase, and trypsin enzymes, in the presence or not of simulated gastric fluid and to determine the content of phenolic compounds by high performance liquid chromatography. All cultivars presented the same composition in phenolic compounds, but in different proportions...
June 29, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28667644/somatic-embryogenesis-in-guava-psidium-guajava-l-current-status-and-future-perspectives
#7
REVIEW
Madhu Kamle, Kwang-Hyun Baek
Guava (Psidium guajava L.) is a highly perishable fruit crop comparable to mango owing to its high medicinal value and intense aroma. The presence of high genetic variability limits the chances of further expansion of guava improvement using biotechnological interventions. Conventional methods of guava improvement encountered with restricted achievement in progress of disease resistant varieties because of existing high genetic variability in the germplasm. There is a considerable demand for the establishment of successful and efficient regeneration protocols via somatic embryogenesis...
July 2017: 3 Biotech
https://www.readbyqxmd.com/read/28629407/antibacterial-activity-of-crude-extracts-of-some-south-african-medicinal-plants-against-multidrug-resistant-etiological-agents-of-diarrhoea
#8
Mary A Bisi-Johnson, Chikwelu L Obi, Babatunde B Samuel, Jacobus N Eloff, Anthony I Okoh
BACKGROUND: This study evaluated the antibacterial activity of some plants used in folklore medicine to treat diarrhoea in the Eastern Cape Province, South Africa. METHODS: The acetone extracts of Acacia mearnsii De Wild., Aloe arborescens Mill., A. striata Haw., Cyathula uncinulata (Schrad.) Schinz, Eucomis autumnalis (Mill.) Chitt., E. comosa (Houtt.) Wehrh., Hermbstaedtia odorata (Burch. ex Moq.) T.Cooke, Hydnora africana Thunb, Hypoxis latifolia Wight, Pelargonium sidoides DC, Psidium guajava L and Schizocarphus nervosus (Burch...
June 19, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28618209/chemical-compositions-antioxidant-and-antimicrobial-activities-of-essential-oil-of-psidium-guajava-l-leaves-from-different-geographic-regions-in-china
#9
Lu Wang, Yanan Wu, Tao Huang, Kan Shi, Zhenqiang Wu
Hydrodistilled essential oils (EO) of Psidium guajava L. leaves from different regions in China were analyzed by GC and GC/MS. The samples from Guangdong province displayed high EO yields (0.61-0.75%, v/w). A total of 50 components, representing over 98.00% of the EOs, were identified and semi-quantitatived. The major constituents of EOs included β-caryophyllen (17.17-31.38%), γ-gurjunene (9.17-15.22%), τ-cadinol (1.35-10.02%) and calamenene (2.13-7.80%). The terpenoids in all sample oils were dominated by sesquiterpenes hydrocarbons (70...
June 15, 2017: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/28578580/meroterpenoids-with-antitumor-activities-from-guava-psidium-guajava
#10
Xu-Jie Qin, Qian Yu, Huan Yan, Afsar Khan, Mi-Yan Feng, Pan-Pan Li, Xiao-Jiang Hao, Lin-Kun An, Hai-Yang Liu
Psidium guajava L., a species native to South America, has been widely cultivated in the tropical and subtropical areas of China for its popular fruits. The preliminary analysis by liquid chromatography-ultraviolet (LC-UV) indicated the presence of meroterpenoids in the fruits of P. guajava (guava). Subsequent fractionation of the petroleum ether extract resulted in the identification of two new meroterpenoids, psiguajavadials A (1) and B (2), together with 14 previously described meroterpenoids (3-16). Their structures were fully elucidated by comprehensive spectroscopic techniques and theoretical calculations...
June 21, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28546652/chimpanzees-pan-troglodytes-flexibly-use-introduced-species-for-nesting-and-bark-feeding-in-a-human-dominated-habitat
#11
Maureen S McCarthy, Jack D Lester, Craig B Stanford
As habitat loss and fragmentation place growing pressure on endangered nonhuman primate populations, researchers find increasing evidence for novel responses in behavior. In western Uganda between the Budongo and Bugoma Forests, chimpanzees (Pan troglodytes schweinfurthii) inhabit a mosaic landscape comprising forest fragments, human settlements, and agricultural land. We recorded nests and feeding evidence of unhabituated chimpanzees in this region over a 12-mo period. We found extensive evidence of nesting in introduced tree species, including eucalyptus (Eucalyptus grandis), guava (Psidium guajava), cocoa (Theobroma cacao), and Caribbean pine (Pinus caribaea)...
2017: International Journal of Primatology
https://www.readbyqxmd.com/read/28541954/effects-of-two-different-water-sources-used-for-irrigation-on-the-soil-geochemical-properties-and-the-quality-of-the-lohan-guava-psidium-guajava-l-lohan
#12
Dominic Soloman George, Kelvin Kiran Anthony, Vicknesha Santhirasegaram, Nadiah Mohd Saruan, Hasvinder Kaur, Zuliana Razali, Chandran Somasundram
The effect of two different water sources (treated waste water and lake water) used for irrigation on the soil geochemical properties and the fruit quality parameters of the Lohan guava were studied. The fruits' physical attributes, physicochemical attributes, nutritional attributes, mineral content as well as consumers' acceptance were evaluated. The properties of the different water sources and their effect, on both the soil and the quality of the fruits, were evaluated. Analysis of the irrigation water revealed that treated waste water was of acceptable quality with reference to irrigation water quality guidelines, while the lake water used for irrigation fell short in several aspects...
May 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28528109/the-hypoglycemic-effects-of-guava-leaf-psidium-guajava-l-extract-are-associated-with-improving-endothelial-dysfunction-in-mice-with-diet-induced-obesity
#13
Elixabet Díaz-de-Cerio, Alba Rodríguez-Nogales, Francesca Algieri, Miguel Romero, Vito Verardo, Antonio Segura-Carretero, Juan Duarte, Julio Galvez
Obesity is associated with a low-grade inflammatory status that affects vascular function. Previous studies have reported the beneficial effects of Psidium guajava L. (guava) on diabetes. Here we evaluate the how guava leaf extract at the dose of 5 mg/kg, affects vascular dysfunction in obese mice fed a high-fat diet for 7 weeks. Extract intake did not alter weight over time, although it reduced glycemia and insulin resistance, improving the serum lipid profile in obese mice. Additionally, guava leaf extract reversed the endothelial dysfunction found in obese mice in terms of endothelium- and NO (nitric oxide)-dependent vasodilatation induced by acetylcholine in aortic rings...
June 2017: Food Research International
https://www.readbyqxmd.com/read/28481401/genetic-divergence-among-psidium-accessions-based-on-single-nucleotide-polymorphisms-developed-for-eucalyptus
#14
S R Costa, C A F Santos
The goal of this study was to analyze the genetic divergence among Psidium species accessions based on SNPs developed for Eucalyptus. Fifty-three Psidium accessions, including 47 P. guajava, were genotyped with EUCHIP60K. The dendrogram similarity ranged from 0.58 to 1.00, with a cophenetic value of 0.97. Five groups were identified at dendrogram cut point of 0.7: the first with 44 guava accessions, the second with 1 guava accession, the third with 3 P. guineense accessions, the forth with 2 guava accessions, and the fifth with 3 P...
May 4, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28441777/health-effects-of-psidium-guajava-l-leaves-an-overview-of-the-last-decade
#15
REVIEW
Elixabet Díaz-de-Cerio, Vito Verardo, Ana María Gómez-Caravaca, Alberto Fernández-Gutiérrez, Antonio Segura-Carretero
Today, there is increasing interest in discovering new bioactive compounds derived from ethnomedicine. Preparations of guava (Psidium guajava L.) leaves have traditionally been used to manage several diseases. The pharmacological research in vitro as well as in vivo has been widely used to demonstrate the potential of the extracts from the leaves for the co-treatment of different ailments with high prevalence worldwide, upholding the traditional medicine in cases such as diabetes mellitus, cardiovascular diseases, cancer, and parasitic infections...
April 24, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28435376/comparative-evaluation-of-antimicrobial-efficacy-of-an-alternative-natural-agent-for-disinfection-of-toothbrushes
#16
R Vignesh, C Vishnu Rekha, Parisa Norouzi Baghkomeh, Sankar Annamalai, Ditto Sharmin
OBJECTIVE: The aim of this study was to assess the antimicrobial potency of aqueous extract of Psidium guajava leaves in two different concentrations as a toothbrush disinfectant against three oral bacterial species. MATERIALS AND METHODS: Aqueous extracts of P. guajava leaves were prepared at 20% and 30% concentrations and 0.2% chlorhexidine was used as control. The toothbrushes were equally divided into 9 groups with 10 toothbrushes per disinfectant, which were contaminated with Streptococcus mutans, Lactobacillus acidophilus, and Enterococcus faecalis...
January 2017: European Journal of Dentistry
https://www.readbyqxmd.com/read/28432317/psiguajadials-a-k-unusual-psidium-meroterpenoids-as-phosphodiesterase-4-inhibitors-from-the-leaves-of-psidium-guajava
#17
Gui-Hua Tang, Zhen Dong, Yan-Qiong Guo, Zhong-Bin Cheng, Chu-Jun Zhou, Sheng Yin
Bioassay-guided fractionation of the ethanolic extract of the leaves of Psidium guajava led to the isolation of 11 new Psidium meroterpenoids, psiguajadials A-K (1-11), along with 17 known ones (12-28). Their structures and absolute configurations were elucidated by spectroscopic methods and comparison of experimental and calculated ECD. Compounds 1 and 2 represent two unprecedented skeletons of 3,5-diformyl-benzyl phloroglucinol-coupled sesquiterpenoid, while 3 is the first example of Psidium meroterpenoids coupling via an oxepane ring...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28365386/antibacterial-function-of-herbal-extracts-on-growth-survival-and-immunoprotection-in-the-black-tiger-shrimp-penaeus-monodon
#18
Sheikh AftabUddin, Mohammad Abdul Momin Siddique, Shaharin Salma Romkey, William L Shelton
This study examined the effects of an herbal extract composed of nine herbs i.e Aloe vera, Andrographis pariculata, Annona squamosa, Azadirachta indica, Citrus aurantifolia, Coriandrum sativum, Ocimum sanctum, Ollium cepa and Psidium guajava on growth, survival rate and immunoprotection against pathogenic Vibrio harveyi in the tiger shrimp Penaeus monodon. The petroleum ether, methanol and N-hexen extracts of different herbal plants were selected, processed and thoroughly mixed in equal proportions and added to the shrimp diets at a concentration of 1...
March 29, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28362985/relationship-between-psidium-species-myrtaceae-by-resistance-gene-analog-markers-focus-on-nematode-resistance
#19
L R Noia, A C Tuler, A Ferreira, M F S Ferreira
Guava (Psidium guajava L.) crop is severely affected by the nematode Meloidogyne enterolobii. Native Psidium species have been reported as sources of resistance against this nematode. Knowledge on the molecular relationship between Psidium species based on plant resistance gene analogs (RGA) can be useful in the genetic breeding of guava for resistance to M. enterolobii. In this study, RGA markers from conserved domains, and structural features of plant R genes, were employed to characterize Psidium species and establish genetic proximity, with a focus on nematode resistance...
March 16, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28351513/aflatoxin-biosynthesis-control-produced-by-aspergillus-flavus-in-layer-hens-feed-during-storage-period-of-six-months
#20
S M Hassan, B Sultana, M Iqbal
Aflatoxins (AFTs) are a group of closely related toxins that are produced by different fungus species. Food and feed contamination with AFT is a worldwide health-related problem. As a result of fungal attack, the food and feed resulted in a principal socioeconomic loss and toxins produced in feed and food items harm the humans and animals in different ways. The anti-aflatoxigenic effect Psidium guajava, Ficus benghalensis, Gardenia radicans, Punica granatum and Ziziphus jujuba leaves were evaluated against aflatoxins (AFTs), produced by Aspergillus flavus in layer feed during storage...
March 25, 2017: Journal de Mycologie Médicale
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