LEAF DIFFUSIVE RESISTANCE, SURFACE TEMPERATURE, OSMOTIC POTENTIAL AND 14CO2-ASSIMILATION CAPABILITY AS INDICATORS OF DROUGHT INTENSITY IN RAPE

1982 ◽  
Vol 62 (3) ◽  
pp. 785-789 ◽  
Author(s):  
JOHN M. CLARKE ◽  
THOMAS N. McCAIG
Keyword(s):  
Surface Temperature ◽  
Osmotic Potential ◽  
Brassica Campestris ◽  
Drought Response ◽  
Drought Intensity ◽  
Resistance Surface ◽  
Diffusive Resistance ◽  
14Co2 Assimilation

Leaf diffusive resistance, temperature and osmotic potential were evaluated in three Brassica campestris and three B. napus cultivars under both irrigated and rain-fed environments. These techniques differentiated between environments but not between cultivars within environments. Incorporation of 14CO2 by stressed plants of two cultivars under rain-fed conditions showed more promise as a means of differentiating cultivar drought response.

Variation between and within species of rapeseed (Brassica campestris and B. napus) in response to drought stress III. Physiological and physicochemical characters

1978 ◽  
Vol 29 (3) ◽  
pp. 491 ◽  
Author(s):  
RA Richards
Keyword(s):  
Drought Resistance ◽  
Brassica Campestris ◽  
Germination Rate ◽  
Genotypic Variation ◽  
Leaf Tissue ◽  
Germination Percentage ◽  
Proline Accumulation ◽  
Diffusive Resistance ◽  
Simulated Drought ◽  
Use Efficiency

Genotypic variation in physiological and physicochemical parameters associated with drought resistance was observed between cultivars in Brassica napus and B. campestris. Significant variation in proline accumulation, chlorophyll stability, germination rate and percentage, relative turgidity, growth rates and water use efficiency were found in plants grown under simulated drought conditions in a glasshouse. No variation was detected between cultivars for leaf diffusive resistance or heat tolerance. A yield index for each cultivar was derived from yield performances in nine different field environments. Chlorophyll stability and proline accumulation in leaf tissue and germination percentage in solution equivalent to –17.5 bars osmotic potential was clearly related to this yield index in B. napus and to a lesser extent in B. campestris. The winter cultivars of B. napus also possessed drought resistance characteristics, and they may be a valuable resource for the development of cultivars for droughted environments. Parameters were measured in a glasshouse, prior to anthesis, and therefore offer potential as ancillary selection criteria for drought resistance in oilseed rape growing in Western Australia.

Purification of an antifungal PR-5 protein from flower buds of Brassica campestris and cloning of its gene

1997 ◽  
Vol 101 (3) ◽  
pp. 583-590 ◽  
Author(s):  
Na Eun Cheong ◽  
Yeon Ok Choi ◽  
Woe Yeon Kim ◽  
Sun Chang Kim ◽  
Moo Je Cho ◽  
...  
Keyword(s):  
Brassica Campestris ◽  
Flower Buds ◽  
Its Gene

Application of pyrometer and standard sample to determine surface temperature of studied materials

2019 ◽  
pp. 9-13
Author(s):  
V.Ya. Mendeleyev ◽  
V.A. Petrov ◽  
A.V. Yashin ◽  
A.I. Vangonen ◽  
O.K. Taganov
Keyword(s):  
Composite Material ◽  
Surface Temperature ◽  
Relative Error ◽  
Wavelength Range ◽  
Standard Sample ◽  
A Priori ◽  
Temperature Changes ◽  
Surface Temperatures ◽  
Relative Errors ◽  
Normal Emissivity

Determining the surface temperature of materials with unknown emissivity is studied. A method for determining the surface temperature using a standard sample of average spectral normal emissivity in the wavelength range of 1,65–1,80 μm and an industrially produced Metis M322 pyrometer operating in the same wavelength range. The surface temperature of studied samples of the composite material and platinum was determined experimentally from the temperature of a standard sample located on the studied surfaces. The relative error in determining the surface temperature of the studied materials, introduced by the proposed method, was calculated taking into account the temperatures of the platinum and the composite material, determined from the temperature of the standard sample located on the studied surfaces, and from the temperature of the studied surfaces in the absence of the standard sample. The relative errors thus obtained did not exceed 1,7 % for the composite material and 0,5% for the platinum at surface temperatures of about 973 K. It was also found that: the inaccuracy of a priori data on the emissivity of the standard sample in the range (–0,01; 0,01) relative to the average emissivity increases the relative error in determining the temperature of the composite material by 0,68 %, and the installation of a standard sample on the studied materials leads to temperature changes on the periphery of the surface not exceeding 0,47 % for composite material and 0,05 % for platinum.

CONDITIONS OF HILLING HABITAT OF CHELONIA MYDAS (GREEN TURTLE) IN PANGUMBAHAN BEACH UJUNG GENTENG, SUKABUMI SELATAN

2019 ◽  
Vol 1 (02) ◽  
pp. 64-67
Author(s):  
Meilisha Putri Pertiwi ◽  
Suci Siti Lathifah
Keyword(s):  
Data Collection ◽  
Surface Temperature ◽  
Green Turtle ◽  
Data Retrieval ◽  
Distribution Patterns ◽  
Chelonia Mydas ◽  
Nesting Habitat ◽  
Beach Width ◽  
The Many ◽  
Pandanus Tectorius

Research on the condition of the nesting habitat of Chelonia mydas (green turtle) in Pangumbahan Beach, Ujung Genteng, South Sukabumi has been carried out. Data retrieval is done 6 times for 2 days, 27-28 November 2017 at 3 observation stations. The abiotic parameters measured include surface temperature and depth of 50 cm, surface humidity and depth of 50 cm, beach width, beach slope, and the size of sand grains. While the biotic parameters measured were density, relative density, the frequency of attendance, and distribution patterns of Pandanus tectorius (sea pandanus) vegetation. Based on the results of data processing, the biophysical conditions in Pangumbahan Beach are still suitable for the Chelonia mydas nesting habitat. It also got clear evidence of the many Chelonia mydas landings during the data collection.

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