Wyniki wyszukiwania

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Efficacy of coupling gamma irradiation with calcium chloride and lemongrass oil in maintaining guava fruit quality and inhibiting fungal growth during cold storage

100%

Hassanein R. A., Salem E. A., Zahran A. A.

Folia Horticulturae

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2018

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tom 30

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nr 1

2

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Physical and biochemical properties of selected tropical fruits

100%

Athmaselvi K. A., Jenney P., Pavithra C., Roy I.

International Agrophysics

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2014

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tom 28

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nr 3

This study was conducted to determine the phy- sical and biochemical properties of guava, sapota, and papaya. The physical properties studied were: dimensions, shell ratio, surface area, bulk and true density, porosity, sphericity, packing coeffi- cient, aspect ratio, and roundness index. The specific heat at various mass fractions, biochemical properties like pH, titratable acidity, total soluble solids, and colour analysis were studied for fruit pulps. The viscosity of fruits was studied at various mass fractions. The high sphericity of guava and sapota indicated that those fruits had high rolling capability, which is an important factor for designing hoppers. Bioch emical analysis showed that sapota was the sweetest fruit amongst the three studied.

3

Effect of pruning Intensities on the performance of fruit plants under mid-hill condition of Eastern Himalayas: case study on Guava

100%

Bhagawati R., Bhagawati K., Choudhary V. K., Rajkowa D. J., Sharma R.

International Letters of Natural Sciences

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2015

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tom 46

Current study was undertaken to highlight the effect of pruning on improving vigor of old orchards and increasing performance in terms of fruit yield and quality under water and nutrient stressed condition of mid hills of Eastern Himalaya. Guava was taken for the case study and all the physical and chemical properties of the fruits and other attributes of plant were evaluated using standard methods under three pruning intensities (light, moderate and severe) and no pruning. The emergence of bud was earliest in severe pruning, number of buds per shoot was highest with light pruning and cumulative lengths of new shoots were found to be highest in severe pruning. Fruit yield, size and weight were found to increase with pruning intensities and lowest in case of no pruning. Regarding chemical properties, total soluble solids and total sugar found to increase with enhanced pruning severity and least in case of no pruning. Acidity was found to be highest with no pruning and decrease with increase in pruning intensities. Overall pruning found to have rejuvenating impact on aged trees due to better light interception leading to better photosynthetic rate, better nutrient and water supply with reduced canopy and better quality yields.

4

Compositional and enzymatic changes in guava [Psidium guajava L.] fruits during ripening

100%

Jain N., Dhawan K., Malhotra S. P., Siddiqui S., Singh R.

Acta Physiologiae Plantarum

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2001

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tom 23

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nr 3

5

Water salinity and initial development of four guava [Psidium guajava L.] cultivars in North-Eastern Brazil

100%

Cavalcante I. H. L., Cavalcante L. F., Hu Y., Beckmann-Cavalcante M. Z.

Journal of Fruit and Ornamental Plant Research

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2007

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tom 15

6

Response of guava trees (Psidium guajava) to soil applications of mineral and organic fertilisers and biofertilisers under conditions of low fertile soil

80%

Shukla S. K., Adak T., Singha A., Kumar K., Singh V. K., Singh A.

Journal of Horticultural Research

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2014

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tom 22

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nr 2

7

Shoot multiplication and plant regeneration of guava [Psidium guajava L.] from nodal explants on in vitro raised plantlets

80%

Rai M. K., Jaiswal V. S., Jaiswal U.

Journal of Fruit and Ornamental Plant Research

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2009

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tom 17

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nr 1

29-38

A micropropagation method is described for guava (Psidium guajava L.) using nodal expiants from somatic embryo-derived young and aseptic plantlets. Multiple shoots were induced from axillary buds on MS medium containing different concentrations of N6-benzylaminopurine (BAP), either alone or in combination with kinetin (Kn), indole-3-acetic acid (1AA) or a-naphthalene acetic acid (NAA). Medium containing 1 mg l-1 BAP was the most effective for shoot multiplication. In vitro regenerated shoots developed roots either on MS medium alone or on MS medium supplemented with indole-3-butyric acid (1BA). The rooted plantlets were successfully acclimatized.

8

Chemical composition, antioxidant and antimicrobial activities of Moroccan species of Psidium guajava extracts

80%

Lahlou J., Amraoui B. E., El-Wahidi M., Bamhaoud T.

Roczniki Państwowego Zakładu Higieny

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2022

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tom 73

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nr 1

Background. During the recent years, appropriate attention has been paid to the oxidative stress which damages the body’s cells, proteins, and DNA. Therefore, the need of antioxidants becomes a therapeutic and preventive priority. In addition, microbial infections also constitute a public health problem. Objective. To find efficient, reliable and safe alternatives sources to synthetic antioxidants, antibiotics and antifungals drugs. Materials and methods. Extract and essential oil of Psidium guajava were screened for their antioxidant and antimicrobial activities against gram positive bacteria (Enterococcus faecalis and Staphylococcus aureus), gram negative bacteria (Citrobacter freundii, Escherichia coli and Pseudomonas sp) and fungi (Candida albicans,Candida tropicalis and Cryptococcus neoformans), as well as to determine the functional groups of phytochemicals present in the essential oil by Fourier transform infrared spectroscopy (FTIR). Results. The results indicate that P. guajava leaves extract demonstrated very high antioxidant activity and P.guajava essential oil showed the highest polyphenols content. The antioxidant capacity showed a significant negative linear correlation to total polyphenolic content (TPC) with Pearson’s correlation coefficients. P. guajava essential oil shows high antibacterial and antifungal activity against all the studied bacteria and fungi.The FTIR analysis of P. guajava essential oil showed the presence of several functional groups (ethers, esters, ketones, terpenes, alkanes, aldehydes, aromatic hydrocarbons, alcohols, and phenols). The relationship between the chemical composition and antimicrobial activity of P.guajava essential oil suggests that the attribution of its antimicrobial activity to a particular compound or a synergistic effects between its different constituents remains difficult. Conclusions. The present study demonstrated that Psidium guajava is a valuable source of active compounds with antioxidant and antimicrobial activities. This finding suggests the new use of the fruits and the leaves extracts of this plant in the treatment of bacterial and fungal infections, as well as for the extraction of new antioxidants. Therefore, it is necessary to be carried out in another study to identify the active(s) compound(s) in P.guajava essential oil with respect to their mechanisms and synergistic actions.

Ograniczanie wyników

Efficacy of coupling gamma irradiation with calcium chloride and lemongrass oil in maintaining guava fruit quality and inhibiting fungal growth during cold storage

Physical and biochemical properties of selected tropical fruits

Effect of pruning Intensities on the performance of fruit plants under mid-hill condition of Eastern Himalayas: case study on Guava

Compositional and enzymatic changes in guava [Psidium guajava L.] fruits during ripening

Water salinity and initial development of four guava [Psidium guajava L.] cultivars in North-Eastern Brazil

Response of guava trees (Psidium guajava) to soil applications of mineral and organic fertilisers and biofertilisers under conditions of low fertile soil

Shoot multiplication and plant regeneration of guava [Psidium guajava L.] from nodal explants on in vitro raised plantlets

Chemical composition, antioxidant and antimicrobial activities of Moroccan species of Psidium guajava extracts