THE EFFECTS OF SUPER ABSORBENT POLYMER APPLICATION ON THE PHYSIOLOGICAL AND BIOCHEMICAL PROPERTIES OF TOMATO (Solanum lycopersicum L.) PLANTS GROWN BY SOILLESS AGRICULTURE TECHNIQUE

Limitation of water resources and its great impact on agricultural and natural resources play a crucial role in the efficiency of water use. Applying super absorbent polymer to the soil may be one of the methods to minimize the stress of weather dryness in arid and semi-arid regions. In order to evaluate the effects of hydrophilic polymer application on yield and water use efficiency of rapeseed plants, an experiment was conducted under field condition in 2012 at the Research Farm of the Faculty of Agriculture, University of Maragheh. Treatments’ factors were: (i) 3 super absorbent polymers (SAP) (Taravat A200) levels of 0 (without application), 75 and 150 kg ha-1 A200 application, (ii) three irrigation levels of 80, 120 and 180 mm evaporation from class A basin in main plots, (iii) two cultivars ʻHyola 401ʼ and ʻRVSʼ in sub plots as factorial split plot combination based on completely randomized block design with three replications. The results showed that in all of the measured traits within the experiment there were significant differences between SAP levels. Furthermore, increasing irrigation interval led to an increase in a thousand seeds’ weight, but decreased seed yield. Increasing water stress raised seed oil percent and infertile silique and subsequently resulted in reduced oil yield. ʻHyola 401ʼ was more susceptible to embryo abortion compared with ʻRVSʼ. As a conclusion of the research, SAP (A200) application in quantities smaller than 75 kg ha-1 may be recommended for rapeseed production under field condition.

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Active Antibiotics Production by Actinomycetes Indigenous To Saudi Arabia Soils

International Journal of Pharma and Bio Sciences ◽

10.22376/ijpbs/lpr.2021.11.6.l20-29 ◽

2021 ◽

Vol 11 (6) ◽

pp. 20-29

Author(s):

Fetoon M ◽

helaiwi Alk ◽

Ismet Ara ◽

Nadine Moubayed

Keyword(s):

Saudi Arabia ◽

Biochemical Properties ◽

Soil Samples ◽

Fungal Strain ◽

Pathogenic Microorganisms ◽

Bacterial Strains ◽

Desert Soils ◽

Growth Environment ◽

Physiological And Biochemical ◽

Physiological And Biochemical Properties

Streptomyces are the most popular among the Actinomycetes groups and found in soils worldwide. They form an important part of the soil ecology within the Actinomycetales order. Streptomyces are diverse as secondary antibiotic metabolites such as Novobiocin, Amphotericin, Vancomycin, Neomycin, Gentamicin, Chloramphenicol, Tetracycline, Erythromycin and Nystatin. Thus, the current study was aimed to isolate, identify and assess the active antibiotic metabolites produced by different actinomyces sp. found in Saudi Arabian soils. Six samples were collected from desert soils of the Al Thumamah area and analyzed using GS-MS. Scanning Electron Microscopy was used to identify the bacterial strains along with their antibiotic metabolites effectiveness of secondary metabolites (antibiotics) against different Gram-positive (Bacillus subtilis, Staphylococcus aureus), negative pathogens (Pseudomonas aeruginosa, Escherichia coli, Salmonella suis, and Shigella sonnei) as well as the fungal strain Candida albicans was investigated. Thirty active bacterial (F1-30) strains were isolated from the soil samples and the strains F3, F7, F22, F30 have white, gray, pink, yellow and red colours respectively. Only ten strains (F13, F14, F15, F16, FI7, F18, F19, F20, F21, and F22) were found to have antimicrobial activity against at least one pathogen. The optimum growth environment was pH 4-10, temperature (300C), and NaCl (7% w/v) concentration. According to our findings, the extreme desert environment of Al Thumamah from Saudi Arabia is rich in its actinobacterial population with diverse colouring groups and various physiological and biochemical properties. This shows it’s capability of generating secondary metabolite elements that could inhibit pathogenic microorganisms.

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Some Physiological and Biochemical Properties of Denitrification by Azospirillum Brasilense

Azospirillum III ◽

10.1007/978-3-642-70791-9_13 ◽

1985 ◽

pp. 127-138 ◽

Cited By ~ 2

Author(s):

G. Danneberg ◽

W. Zimmer ◽

H. Bothe

Keyword(s):

Azospirillum Brasilense ◽

Biochemical Properties ◽

Physiological And Biochemical ◽

Physiological And Biochemical Properties

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Starch degradation characteristics in relation to physiological and biochemical properties during growth and maturation of apple fruit

Journal of Applied Horticulture ◽

10.37855/jah.2009.v11i01.04 ◽

2009 ◽

Vol 11 (01) ◽

pp. 23-30

Author(s):

Manasikan Thammawong ◽

Osamu Arakawa

Keyword(s):

Biochemical Properties ◽

Apple Fruit ◽

Starch Degradation ◽

Physiological And Biochemical ◽

Physiological And Biochemical Properties

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The effect of humic acid and water super absorbent polymer application on sesame in an ecological cropping system: a new employment of structural equation modeling in agriculture

Chemical and Biological Technologies in Agriculture ◽

10.1186/s40538-018-0131-2 ◽

2019 ◽

Vol 6 (1) ◽

Cited By ~ 1

Author(s):

Mohsen Jahan ◽

Mahdi Nassiri Mahallati ◽

Mohammad Behzad Amiri

Keyword(s):

Structural Equation Modeling ◽

Humic Acid ◽

Structural Equation ◽

Cropping System ◽

Equation Modeling ◽

Super Absorbent Polymer ◽

System A ◽

Polymer Application ◽

Absorbent Polymer

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Physiology and Nutrition of Treponema primitia, an H2/ CO2-Acetogenic Spirochete from Termite Hindguts

Applied and Environmental Microbiology ◽

10.1128/aem.70.3.1307-1314.2004 ◽

2004 ◽

Vol 70 (3) ◽

pp. 1307-1314 ◽

Cited By ~ 91

Author(s):

Joseph R. Graber ◽

John A. Breznak

Keyword(s):

Nadh Oxidase ◽

Natural Habitat ◽

Biochemical Properties ◽

Organic Substrates ◽

Growth And Survival ◽

Cell Extracts ◽

Termite Hindgut ◽

Physiological And Biochemical ◽

Physiological And Biochemical Properties

ABSTRACT Treponema primitia strains ZAS-1 and ZAS-2, the first spirochetes to be isolated from termite hindguts (J. R. Leadbetter, T. M. Schmidt, J. R. Graber, and J. A. Breznak, Science 283:686-689, 1999), were examined for nutritional, physiological, and biochemical properties relevant to growth and survival in their natural habitat. In addition to using H2 plus CO2 as substrates, these strains were capable of homoacetogenic growth on mono- and disaccharides and (in the case of ZAS-2) methoxylated benzenoids. Cells were also capable of mixotrophic growth (i.e., simultaneous utilization of H2 and organic substrates). Cell extracts of T. primitia possessed enzyme activities of the Wood/Ljungdahl (acetyl coenzyme A) pathway of acetogenesis, including tetrahydrofolate-dependent enzymes of the methyl group-forming branch. However, a folate compound was required in the medium for growth. ZAS-1 and ZAS-2 growing on H2 plus CO2 displayed H2 thresholds of 650 and 490 ppmv, respectively. Anoxic cultures of ZAS-1 and ZAS-2 maintained growth after the addition of as much as 0.5% (vol/vol) O2 to the headspace atmosphere. Cell extracts exhibited NADH and NADPH peroxidase and NADH oxidase activities but neither catalase nor superoxide dismutase activity. Results indicate that (i) T. primitia is able to exploit a variety of substrates derived from the food of its termite hosts and in so doing contributes to termite nutrition via acetogenesis, (ii) in situ growth of T. primitia is likely dependent on secretion of a folate compound(s) by other members of the gut microbiota, and (iii) cells possess enzymatic adaptations to oxidative stress, which is likely to be encountered in peripheral regions of the termite hindgut.

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