scholarly journals Mycorrhizal dependency and growth response of A. chinensis (Osbeck) Merrill and Pongamia pinnata (L.) pierre in soil media with low pH and high aluminium

2021 ◽  
Vol 870 (1) ◽  
pp. 012018
Author(s):  
Budi Arty ◽  
Sri Wilarso Budi
2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Budi Sri Wilarso ◽  
CAHYO WIBOWO ◽  
ANDI SUKENDRO ◽  
HABIB SATRIO BEKTI

Abstract. Budi SW, Wibowo C, Sukendro A, Bekti HS. 2020. Growth improvement of Falcataria moluccana inoculated with MycoSilvi grown in post-mining silica sand soil medium amended with soil ameliorants. Biodiversitas 21: 422-427. High aluminum content in soil of post-mining silica sand area inhibits plant growth. MycoSilvi is an inoculum of Arbuscular Mycorrhizal Fungi (FMA) enriched with Mycorrhizal Helper Bacteria (MHBs) which plays an important role for improving plant growth in unfertile soil medium. The aims of this research were to analyze the growth response of Falcataria moluccana (Miq.) Barneby & JW Grimes) seedlings treated with MycoSilvi and soil ameliorants (compost and lime) in post-mining silica sand soil medium. The randomized complete design with factorial scheme was used in this study. The results showed that the interactions of MycoSilvi and Soil ameliorant significantly increased height, diameter, biomass and mycorrhizal colonization of F. moluccana. Combination of MycoSilvi variant 3 and lime increased height, diameter, and biomass of F. moluccana by 965%, 147%, and 1427% respectively, as compared to those of control plants. The mycorrhizal roots colonization in those treatments was 98%. The addition of compost and lime increased pH and decreased Aluminum and Fe of the soil medium. F. moluccana seedlings have high mycorrhizal dependency on post-mining silica sand soil media. These results indicate prospective uses of MycoSilvi and soil ameliorants for improving plant growth in unfertile soil medium, including soil in post-mining area.


2018 ◽  
Vol 69 (10) ◽  
pp. 1031 ◽  
Author(s):  
Kathryn Wigley ◽  
Hayley J. Ridgway ◽  
Alan W. Humphries ◽  
Ross A. Ballard ◽  
Derrick J. Moot

Acidic conditions with damaging levels of available aluminium (Al3+) currently limit lucerne (Medicago sativa) production on soils in the New Zealand high country and in large areas of Australia. Increased lucerne nodulation could be achieved by using an Al3+-tolerant strain of Sinorhizobium meliloti to inoculate an Al3+-tolerant lucerne line. The Al3+ tolerance of the current commercial Australasian inoculant strain for lucerne, S. meliloti RRI128, was compared with strain SRDI736, selected in Australia for tolerance to low pH. Four Al3+ levels (0, 2, 4 and 8 µm) were created at pH 5.1 in a hydroponic system. The rhizobial strains were evaluated on SARDI AT7, a lucerne line selected for improved growth and nodulation in acidic solution culture with Al3+, and on Stamina 5, a commercial cultivar commonly grown in Australasia. SARDI AT7 when inoculated with strain SRDI736 produced more nodules per plant (3.6 vs 2.4) and had higher nodulation percentage (>80% vs <50%) at all Al3+ levels than when inoculated with RRI128. The percentage of nodulated Stamina 5 plants after inoculation with the commercial strain was lower than after inoculation with strain SRDI736 (10–16% vs 25–70%) at all Al3+ levels. The potential of S. meliloti strains SRDI736, SRDI672 and RRI128 and rates of lime to increase lucerne nodulation and dry matter production in soils of low pH (<5.5, in water) and high Al3+ (>3 mg kg–1 soil) was also investigated in a pot trial. Lime had a more consistent effect than inoculant strain for increasing nodulation. At 0.5 and 2 t lime ha–1, plants inoculated with strains SRDI672 and SRDI736 had more nodules per plant than plants inoculated with the commercial strain. At 4 t lime ha–1, the number of nodules per plant was highest for all three inoculants, and there were no differences among them. This confirms the importance of lime to increase lucerne nodulation in low-pH, high-Al3+ soils. However, where liming is uneconomic or impractical, the results show that it was possible to select rhizobial strains to increase lucerne nodulation in acidic soils with damaging levels of available Al3+.


2017 ◽  
Vol 18 (3) ◽  
pp. 422
Author(s):  
I Wayan Suardana ◽  
Yan Ramona ◽  
Sri Wahyuni

The main aim of this study was to determine the potency of lactic acid bacteria (LAB) isolate 18A(Lactococcuslactisssplactis 1),isolated from the colon of Bali cattle to be used as a probiotic candidate. The study was started by confirmation tests of the isolate, including test for growth response in De Man Rogosa and Sharpe(MRS) brothmedium, test on catalase production, and Gram staining.Its probiotic potencywas tested by growing theisolate in MRS broth medium in low pH conditions (pH 2.3 and 4) and in MRS medium supplemented with various concentrations of sodium deoxycholatet (NaDC) (0.2 mM, 0.4 mM, and 0.6 mM). The results showed that isolate 18A was able to grow well in De Man Rogosa and Sharpebrothmediumunder anaerobic condition. In addition, the isolate was catalase negative and Gram positive, indicating that this isolate was confirmed as an LAB isolate. The isolate was resistant to low pH conditions (up to pH 2) and to high concentration of NaDC (up to 0.6 mM), indicating that this isolate has potential to be developed as a probiotic candidate. Further tests are still required to confirm its use asprobiotic. ABSTRAK Bakteri asam laktat (BAL) merupakan salah satu kelompok mikroorganisme yang memiliki peranan penting dalam menjaga kesehatan saluran pencernaan pada hewan atau manusia. Tujuan penelitian ini adalah untuk mengetahui potensi bakteri asam laktat isolat BAL 18A (Lactococcus lactis ssp lactis 1)yang diisolasi dari kolon sapi bali sebagai kandidat probiotik. Penelitian diawali dengan tahapan konfirmasi isolat 18A melalui beberapa uji, seperti uji penumbuhan pada De Man Rogosa and Sharpebroth, uji katalase, dan pewarnaan Gram. Potensinya sebagai probiotik diuji dengan melakukan pengujian terhadap pH rendah (pH 2, 3, dan 4) dan natrium deoksikolat (NaDC) dengan konsentrasi 0,2 mM, 0,4 mM, dan 0,6 mM. Hasil penelitian menunjukkan bahwa isolat BAL 18A mampu tumbuh dengan baik pada medium De Man Rogosa and Sharpebroth dalam suasana anaerob, katalase negatif, dan Gram positif,. Hasil ini mengindikasikan bahwa isolat 18A ini adalah isolat BAL. Dalam uji ketahanan terhadap pH rendah dan NaDC, isolat ini mampu bertahan hidup pada medium pH 2 dan NaDC pada konsentrasi sampai 0,6 mM. Simpulan penelitian ini adalah isolat BAL 18A berpotensi dikembangkan sebagai kandidat probiotik.


Author(s):  
J. Quatacker ◽  
W. De Potter

Mucopolysaccharides have been demonstrated biochemically in catecholamine-containing subcellular particles in different rat, cat and ox tissues. As catecholamine-containing granules seem to arise from the Golgi apparatus and some also from the axoplasmic reticulum we examined wether carbohydrate macromolecules could be detected in the small and large dense core vesicles and in structures related to them. To this purpose superior cervical ganglia and irises from rabbit and cat and coeliac ganglia and their axons from dog were subjected to the chromaffin reaction to show the distribution of catecholamine-containing granules. Some material was also embedded in glycolmethacrylate (GMA) and stained with phosphotungstic acid (PTA) at low pH for the detection of carbohydrate macromolecules.The chromaffin reaction in the perikarya reveals mainly large dense core vesicles, but in the axon hillock, the axons and the terminals, the small dense core vesicles are more prominent. In the axons the small granules are sometimes seen inside a reticular network (fig. 1).


1964 ◽  
Vol 11 (01) ◽  
pp. 085-093
Author(s):  
W. F Blatt ◽  
JL Gray ◽  
H Jensen

SummaryA sensitive tool has been described for measuring fibrinolysis in reconstituted systems using thrombelastography. Activator mixtures with no appreciable proteolytic activity can similarly be tested in this system when the fibrinogen utilized has sufficient plasminogen present. Exposure of human plasminstreptokinase mixtures formed at pH 7.0 to acid conditions produced a striking loss of activator activity which could not be ascribed to low pH lability of the components, nor to plasmin action on the SK at pH 2.0. This is additional evidence for the hypothesis that human plasmin interacts with SK to form a complex capable of converting human and bovine plasminogen to plasmin.


2019 ◽  
Vol 35 (2) ◽  
pp. 215-224
Author(s):  
Poonam Rani ◽  
◽  
Adarsh Kumar ◽  
Ramesh Chandra Arya ◽  
◽  
...  

TAPPI Journal ◽  
2009 ◽  
Vol 8 (2) ◽  
pp. 33-38 ◽  
Author(s):  
ANNA JONHED ◽  
LARS JÄRNSTRÖM

The aim of this study was to investigate the properties of hydrophobically modified (HM) quaterna-ry ammonium starch ethers for paper sizing. These starches possess temperature-responsive properties; that is, gelation or phase separation occurs at a certain temperature upon cooling. This insolubility of the HM starches in water at room temperature improved their performance as sizing agents. The contact angles for water on sized liner were substantially larger than on unsized liner. When the application temperature was well above the critical phase-separation temperature, larger contact angles were obtained for liner independently of pH compared with those at the lower application temperature. Cobb60 values for liner decreased upon surface sizing, with a low pH and high application temperature giving lower water penetration. Contact angles on greaseproof paper decreased upon sur-face sizing as compared to unsized greaseproof paper, independently of pH and temperature. Greaseproof paper showed no great difference between unsized substrates and substrates sized with HM starch at different pH. This is probably due to the already hydrophobic nature of greaseproof paper. However, the Cobb60 values increased at low pH and low application temperature. Surfactants were added to investigate how they affect the sized surface. Addition of surfactant reduces the contact angles, in spite of indications of complex formation.


ENTOMON ◽  
2019 ◽  
Vol 44 (1) ◽  
pp. 79-80
Author(s):  
R. Sundararaj ◽  
D. Vimala

A new whitefly species, Dialeurodes pongamiae breeding on Pongamia pinnata from Bengaluru (Karnataka: India) is described and illustrated.


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