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Biochemical and mineral analysis of the undervalued leaves – Psidium guajava L.

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Abstract

There are wide varieties of plants which are naturally available in our environment and its nutritional values are still unknown to us. Psidium guajava is one such plant; its nutrient values are still unknown. So the present study deals with the biochemical and nutritive analysis of Psidium guajava L. The leaves of Psidium guajava were collected from Kannur District, Kerala. The leaves were shade dried and powered. The macronutrients and micronutrients were analysed by following standard methods. Thebiochemical studies reveals that the presence of carbohydrate, protein, starch and amino acid in very less amount. It is also estimated that guava leaves are the good source of vitamins such as Vitamin C and Vitamin B, Minerals such as Calcium, Magnesium, Phosphorus and Iron. The results of comparison between the guava leaf and fruit based on concentration of micronutrients reveals that the leaf has more concentration in Vitamin B, Calcium, Magnesium, Phosphorus and Iron, but the concentration of Vitamin C and Potassium were higher in fruit. Hence the study reveals that Psidium guajava leaves rich in nutrients and can be added in our day to day life.

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... Guava leaves contain vitamin B complex that helps to boost the circulation of blood to the brain, promote cognitive function and relax the nerve. Moreover, Guava leaves can be consumed against diseases such as osteoporosis, hypophosphatemia, hypocalcaemia etc, due to the high concentration of calcium and phosphorus (Thomas et al., 2017). In developed countries and poor nations, iron deficiency anaemia has a significant effect on puberty and premenopausal women and it can be minimized by medicinal property of Guava. ...
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Guava (Psidium guajava L.) is one of the top-rated tropical fruit rich in high profile nutrients, so it has been nomenclature by many nutritionists as a “SUPERFRUIT”. Nature has endowed guava with many nutritional and medicinal properties. The tree, which belongs to the family, Myrtaceae is chiefly grown in tropical and subtropical climate. It is commonly known for its food and nutritional values throughout the world. The medicinal properties of guava tree (leaf, roots, bark, leaves, and fruit) are well known in traditional system of medicine. It contains important phytoconstituents such as tannins, triterpenes, flavonoid: quercetin, pentacyclic triterpenoid: guajanoic acid, saponins, carotenoids, lectins, leucocyanidin, ellagic acid, amritoside, beta-sitosterol, uvaol, oleanolic acid and ursolic acid. Quercetin and quercetin -3-O-glucopyranoside and morin are the antioxidants isolated from guava leaves. It is considered to be most active and strong antioxidant, that has free radical balancing activity and its reducing power is much higher than any other compound. Antioxidants, which help to reduce the incidence of degenerative diseases such as arthritis, arteriosclerosis, cancer, heart disease, inflammation and brain dysfunction. In the present chapter, the antioxidant properties of guava and nutritional contents along with health benefits in its various parts have been discussed.
... A great effort is now being made to find highly sustainable nutritionally rich food sources [25]. Thomas et al. [23] reported 16.8 mg protein/100g and 8 mg amino acids/100g in guava leaves as estimated according to Lowry's and ninhydrin methods, respectively. Jassal et al. [21] reported that guava leaves can be utilized as a novel and sustainable dietary source as they are a rich source of proteins, carbohydrates, and dietary fibers. ...
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Psidium guajava (L.) belongs to the Myrtaceae family and it is an important fruit in tropical areas like India, Indonesia, Pakistan, Bangladesh, and South America. The leaves of the guava plant have been studied for their health benefits which are attributed to their plethora of phytochemicals, such as quercetin, avicularin, apigenin, guaijaverin, kaempferol, hyperin, myricetin, gallic acid, catechin, epicatechin, chlorogenic acid, epigallocatechin gallate, and caffeic acid. Extracts from guava leaves (GLs) have been studied for their biological activities, including anticancer, antidiabetic, antioxidant, antidiarrheal, antimicrobial, lipid-lowering, and hepatoprotection activities. In the present review, we comprehensively present the nutritional profile and phytochemical profile of GLs. Further, various bioactivities of the GL extracts are also discussed critically. Considering the phytochemical profile and beneficial effects of GLs, they can potentially be used as an ingredient in the development of functional foods and pharmaceuticals. More detailed clinical trials need to be conducted to establish the efficacy of the GL extracts.
... Guava is a good source of antioxidants, vitamin C, A and B, and different kind of minerals like calcium, iron, magnesium, phosphorus, potash etc. Therefore, it can prove to be very effective in malnutrition (Thomas et al., 2017).In India, occupying area around 2.65 lakh hectares with annual production of 40.54 lakhs MT and the export value is INR 553.26 lakhs. The most growing states are Uttar Pradesh, Madhya Pradesh, Bihar, Andhra Pradesh, TamilNadu, Rajasthan, West Bengal, Punjab, Haryana, Chhatisgarh, Gujarat etc (Anonymous, 2018-19a).In Rajasthan, it is International Journal of Current Microbiology and Applied Sciences ISSN: 2319-7706 Volume 9 Number 9 (2020) Journal homepage: http://www.ijcmas.com ...
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Guava (Psidium guajava L.) is an important fruit crop and good source of income for Indian farmers. It’s infested with some major pests including plant parasitic nematodes. The number of plant parasitic nematode species associated with guava but some species are cause great losses. The accurate identification of nematode species is a basic key of successful management. Soil and plant samples collected from fields of guava from Arathwara village, Sheoganjtehsil, Sirohi district of Rajasthan, India on the GPS location 25003’40.7”N; 72058’05.0”E. The nematode population was identified on the basis of morphological characters and measurements of juvenile, mature female, male and perineal pattern. The all morphological characters of specimen were similar to original description of Meloidogyne enterolobii. The population status of root-knot nematode was ranging from 934 to 1376 juveniles per 200 cc soil. It is a first report of Meloidogyne enterolobii infested guava (Psidium guajava L.) in transitional plain of luni basin of Rajasthan.
... Daun dan buah jambu juga merupakan sumber serat yang sangat baik, Kalium dan vitamin A (Kamath et al, 2014). Jumlah vitamin A pada daun jambu biji tidak terdeteksi, namun kandungan vitamin C dan B cukup tinggi masing-masing 103 mg/100 g dan 14,0 mg/100 gr contoh (Thomas et al, 2017). Sebaliknya buah jambu biji memiliki kandungan vitamin A, lima kali lebih banyak daripada jeruk (Salbiah, 2019). ...
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Tahu merupakan makanan favorit masyarakat sehari-hari. Namun tahu hanya bertahan satu hari saja, sehingga dibutuhkan pengawet untuk memperpanjang masa simpan. Salah satu pengawet alami yang potensial adalah daun jambu biji. Tujuan penelitian ini adalah untuk mengetahui pengaruh perendaman daun jambu biji kering terhadap kadar protein, vitamin A dan sensori tahu. Penelitian ini dilaksanakan pada bulan April – Mei 2019, di Laboratorium pasca panen BPTP Sulawesi Selatan. Rancangan yang digunakan adalah rancangan acak lengkap dengan perlakuan lama perendaman selama 0 hari, 2 hari, 4 hari, 6 hari, 8 hari dan 10 hari dan masing-masing perlakuan diulang tiga kali. Hasil penelitian menunjukkan bahwa perendaman tahu ke dalam ekstrak daun jambu biji (Psidium guava L) tidak berpengaruh nyata terhadap kandungan protein tahu. Perendaman tahu ke dalam ekstrak daun jambu biji berpengaruh nyata terhadap kandungan vitamin A dan sensori tahu. Perlakuan terbaik adalah tahu yang direndam dalam ekstrak daun jambu biji selama 4 hari dengan kadar protein 10.31 %, vitamin A 168 %, warna 2,67 (agak suka), aroma 3.4 (agak suka), rasa 3.07 (agak suka) dan tekstur 2.93 (agak suka).
... The leaves were rich sources of valuable bioactive compounds and can be explored as nutraceuticals. vitamins, minerals and other nutrients it needs to maintain healthy tissues and organ function ( Thomas et al., 2017) There . are wide varieties of plants which are naturally available in our environment; various parts of these plants have nutritional values which are still unknown to us. ...
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Guava (Psidium guajava) is known as Peruka or Paravata in samskrit. In ayurveda it is considered as tridosha nashaka, and indicated in atyagni. Its leaves, bark, fruits and roots are used in treatment of cough, fever, diarrhea, constipation, bad breath, gum problems and numerous other health problems. It is hepatotonic and thus good for liver, digestive system, heart and intestine. Guava can also be eaten by diabetics and those suffering from kidney and liver related problems. Guava contains dietary fiber, protein, calcium, phosphorus, potassium, copper, iron, vitamin A, vitamin b1, vitamin C, vitamin b2, vitamin b3 and folic acid. It is rich in antioxidant and protects cell damage. With this richness guava serves as both food supplement and also very useful medicine.
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In the present study, antibacterial activity of aqueous and organic extracts of Psidium guajava leaves was evaluated against multidrug resistant (MDR) clinical isolates of Staphylococcus aureus strains collected from hospitals in northern (Malabar region) Kerala. The strains which exhibited resistance against all the antibiotics tested was selected for antibacterial assays. Minimum inhibitory concentration (MIC) for methanolic and aqueous extracts was found to be 625 ug/ml and 7.5 mg/ml, respectively. Minimum bactericidal concentration (MBC) recorded for methanolic and aqueous extracts was 1.25 and 12.5 mg/ml, respectively. Methanolic extract at minimum bactericidal concentration inhibited the growth of MDR strain by 80%. Time-kill assay revealed that methanolic extract (4 mg/ml) killed MDR bacteria within 10 hr. Total polypeptide profiling of bacterial cultures by SDS-PAGE indicated a high degree of protein degradative activity of the extract. Finally, a human RBC based haemolytic assay showed absence of haemolysis even at concentrations higher than that of MBC, advocating thereby its safety in therapeutic use.
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Antibacterial activity of Psidium guajava in clinical isolates
  • D W Taura
  • M Yusha'u
  • U A Bello
  • A Hassan
  • J Saidu
  • T W Panda
Taura DW, Yusha'u M, Bello UA, Hassan A, Saidu J, Panda TW. Antibacterial activity of Psidium guajava in clinical isolates. Academia Journal of Microbiology Research. 2014; 2:079-083. ISSN: 2315-7771.