Root distribution of irrigated grapevine rootstocks in a coarse texture soil of the São Francisco Valley, Brazil

An experiment was carried out to determine the root distribution of four grapevine rootstocks (Salt Creek, Dogridge, Courdec 1613, IAC 572) in a coarse texture soil of a commercial growing area in Petrolina County, São Francisco Valley, Brazil. Rootstocks were grafted to a seedless table grape cv. Festival, and irrigated by microsprinkler. Roots were quantified by the trench wall method aided by digital image analysis. Results indicated that roots reached 1 m depth, but few differences among rootstocks were found. All of them presented at least 90 % of the roots distributed until 0.6 m depth, with a greater root presence in the first 0.4 m. The upper 0.6 m can be taken into account as the effective rooting depth for soil and water management.

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Guidelines for irrigation scheduling of banana crop in São Francisco Valley, Brazil. I - Root distribution and activity

Revista Brasileira de Fruticultura ◽

10.1590/s0100-29452004000300021 ◽

2004 ◽

Vol 26 (3) ◽

pp. 459-463 ◽

Cited By ~ 2

Author(s):

Luís Henrique Bassoi ◽

José Antonio Moura e Silva ◽

Emanuel Elder Gomes da Silva ◽

Clovis Manoel Carvalho Ramos ◽

Gilberto Chohaku Sediyama

Keyword(s):

Water Management ◽

Soil Water ◽

Root Distribution ◽

Digital Image Analysis ◽

Water Flux ◽

Irrigation Scheduling ◽

Northeastern Brazil ◽

Rooting Depth ◽

Irrigation Water Management ◽

Banana Crop

In order to establish guidelines for irrigation water management of banana cv. Pacovan (AAB group, Prata sub-group) in Petrolina County, northeastern Brazil, the root distribution and activity were measured on an irrigated plantation, in a medium texture soil, with plants spaced in a 3 x 3 m grid. Root distribution was evaluated by the soil profile method aided by digital image analysis, while root activity was indirectly determined by the changing of soil water content and by the direction of soil water flux. Data were collected since planting in January 1999 to the 3rd harvest in September 2001. Effective rooting depth increased from 0.4 m at 91 days after planting (dap), to 0.6 m at 370, 510, and 903 dap, while water absorption by roots was predominantly in the top 0,6 m.

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Morphometric analysis of cellular interactions with the endothelium during the development of arterial lesions using Scanning Electron Microscopy and digital image analysis

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100128870 ◽

1987 ◽

Vol 45 ◽

pp. 918-919

Author(s):

M.E. Rosenfeld ◽

C. Karboski ◽

M.F. Prescott ◽

P. Goodwin ◽

R. Ross

Keyword(s):

Electron Microscopy ◽

Image Analysis ◽

Quantitative Data ◽

Digital Image Analysis ◽

Lower Cost ◽

Matched Control ◽

Digital Analysis ◽

Cellular Interactions ◽

Arterial Lesions ◽

Scanning Electron

Previous research documenting the chronology of the cellular interactions that occur on or below the surface of the endothelium during the initiation and progression of arterial lesions, primarily consisted of descriptive studies. The recent development of lower cost image analysis hardware and software has facilitated the collection of high resolution quantitative data from microscopic images. In this report we present preliminary quantitative data on the sequence of cellular interactions that occur on the endothelium during the initiation of atherosclerosis or vasculitis utilizing digital analysis of images obtained directly from the scanning electron microscope. Segments of both atherosclerotic and normal arteries were obtained from either diet-induced or endogenously (WHHL) hypercholesterolemic rabbits following 1-4 months duration of hypercholesterolemia and age matched control rabbits. Vasculitis was induced in rats following placement of an endotoxin soaked thread adjacent to the adventitial surface of arteries.

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