A New Gravimetric Method for Estimating Root-Surface Areas

Carley, H. E.; Watson, R. D.

doi:10.1097/00010694-196611000-00001

Cited by 87 publications

(41 citation statements)

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“…Plants were harvested at 25 DAP and data were taken on root dry weight (RDW), shoot dry weight (SDW) and relative root surface area (RRSA). Plants were separated into root and shoot and data on RRSA was taken according to Carley and Watson (1966) prior to oven drying. Thereafter, root and shoot were separately dried to a constant weight at 70°C and their weights taken as RDW and SDW respectively.…”

Section: Methodsmentioning

confidence: 99%

Combining ability and heterosis for aluminium stress tolerance of soybean roots and shoots grown in acid sand culture

Ojo¹,

Ayuba²

2013

J. Plant Breed. Crop Sci.

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A six parent F 2 diallel of soybeans was evaluated in potted acid sand culture with the objective of estimating combining ability and heterosis for aluminium stress tolerance. Highly significant differences were observed among the genotypes, crosses (F 2 /R), Parents, F 2 , Reciprocals (R) and Parents Vs (F 2 /R) for the root dry weight, shoot dry weight and relative root surface area. Both general combining ability (GCA) and specific combining ability (SCA) mean squares were highly significant for the three traits, except the root dry weight, where the SCA was not significant. The result also showed the presence of both additive and dominance gene action and the preponderance of the former compared to the later, indicating the possibility of selection of pure lines from the genotypes studied. Selection from TGX 1896-3F and TGX 1844-18E and crosses involving these two genotypes on acid soil would enhance a rapid progress in the breeding of aluminium tolerant genotypes of soybeans.

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Section: Methodsmentioning

confidence: 99%

Combining ability and heterosis for aluminium stress tolerance of soybean roots and shoots grown in acid sand culture

Ojo¹,

Ayuba²

2013

J. Plant Breed. Crop Sci.

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“…Root surface area was measured using the calcium nitrate gravimetric method [39]. Total nitrogen was measured by an automatic micro-Kjeldahl procedure after digestion (Digestion System 12.1009, and Kjeltec Auto 103 analyzer, Tecator, Ho « gana «s, Sweden).…”

Section: Analysesmentioning

confidence: 99%

Synergism between Phyllobacterium sp. (N2-fixer) and Bacillus licheniformis (P-solubilizer), both from a semiarid mangrove rhizosphere

Rojas¹

2001

FEMS Microbiology Ecology

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Mangrove seedlings were treated with a mixture of two bacterial species, the slow-growing, N 2 -fixing bacterium Phyllobacterium sp. and the fast-growing, phosphate-solubilizing bacterium Bacillus licheniformis, both isolated from the rhizosphere from black, white, and red mangroves of a semiarid zone. Nitrogen fixation and phosphate solubilization increased when the mixture was used compared to the effects observed when adding individual cultures, notwithstanding that there was no increase in bacterial multiplication under these conditions. Inoculation of black mangrove seedlings in artificial seawater showed the mixture performed somewhat better than inoculation of the individual bacterium; more leaves were developed and higher levels of 15 N were incorporated into the leaves, although the total nitrogen level decreased. This study demonstrates that interactions between individual components of the rhizosphere of mangroves should be considered when evaluating these bacteria as plant growth promoters. ß

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“…Total surface area of roots developed in the nutrient solution was estimated from washed and air-dried (30min at room temperature) samples by a gravimetric method (Carley and Watson, 1966) using an aqueous solution of calcium nitrate. The shoot and root portions were separated, and the growth measurements were taken.…”

Section: Plant Growth Measurementsmentioning

confidence: 99%

Influence of Azospirillum inoculation on the mineral uptake and growth of rice under hydroponic conditions

1988

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Seedlings of rice (Oryza sativa L. var. IR42) were inoculated with nitrogen-fixing Azospirillum lipoferum (strain 34H) by immersing the roots in the inoculum for 6 h. The plants were grown in the prescence of NH~--N for 47 days in a hydroponic system under greenhouse conditions. Inoculation significantly enhanced POa-ion uptake of the plants in 4 of the 7 samplings tested, while the uptake of NH4-ion was significantly increased in two samplings and was decreased in one sampling. Inoculation reduced root length significantly and caused significant increases in shoot fresh and dry weights. Root surface area was not affected by inoculation. Bacterial population counts suggested that A. lipoferum survived on the roots till the end of the experiment.

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A New Gravimetric Method for Estimating Root-Surface Areas

Cited by 87 publications

References 0 publications

Combining ability and heterosis for aluminium stress tolerance of soybean roots and shoots grown in acid sand culture

Combining ability and heterosis for aluminium stress tolerance of soybean roots and shoots grown in acid sand culture

Synergism between Phyllobacterium sp. (N2-fixer) and Bacillus licheniformis (P-solubilizer), both from a semiarid mangrove rhizosphere

Influence of Azospirillum inoculation on the mineral uptake and growth of rice under hydroponic conditions

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