scholarly journals Studies on Leaf Surface Lipid of Tobacco III. Compositional Change in Alkane during Growth and Senescence of Tobacco Leaves

1980 ◽  
Vol 44 (9) ◽  
pp. 2119-2124
Author(s):  
Kenji Gamou ◽  
Nobumaro Kawashima
Keyword(s):  
Leaf Surface ◽  
Surface Lipid ◽  
Compositional Change ◽  
Tobacco Leaves

Studies on Leaf Surface Lipid of Tobacco IV. Comparisons of Epicuticular Alkane Composition inNicotianaSpecies

1981 ◽  
Vol 45 (3) ◽  
pp. 645-652
Author(s):  
Kenji Gamou ◽  
Nobumaro Kawashima
Keyword(s):  
Leaf Surface ◽  
Surface Lipid

THE RELATION BETWEEN DEW AND TOBACCO WEATHER FLECK

1966 ◽  
Vol 46 (4) ◽  
pp. 349-353 ◽  
Author(s):  
F. D. H. Macdowall
Keyword(s):  
Oxygen Uptake ◽  
Causal Relationship ◽  
Leaf Surface ◽  
Tobacco Leaves

The coincidence of dew and fleck in tobacco leaves has suggested a causal relationship. However, water condensed on the leaf surface or temporarily infiltrated into areas of lamina did not cause any visible damage to the tissues and did not contribute to the amount of fleck caused by a preceding dose of ozone. In fact, infiltrated water delayed the development of fleck symptoms caused by ozone, by suppressing damaging rates of oxygen uptake.

scholarly journals The Roles of Riboflavin and Inhibitors in Conidial Germination in Peronospora Tabacina Adam

1966 ◽  
Vol 19 (2) ◽  
pp. 335 ◽  
Author(s):  
CJ Shepherd ◽  
I Tosic
Keyword(s):  
Spore Germination ◽  
Leaf Surface ◽  
Conidial Germination ◽  
Water Soluble ◽  
Natural Conditions ◽  
Peronospora Tabacina ◽  
Tobacco Leaves ◽  
Washing Process ◽  
Good Germination ◽  
Exogenous Source

Shepherd (1962) reported results suggesting that conidia of Peronospora tabacina Adam required an exogenous source of riboflavin for germination, but noted that the technique used was open to the objection that material might be leached from the spores during the washing process. Washing was found to be obligatory by Shepherd and Mandryk (1962) in order to obtain good germination and it was suggested that conidia contained a water-soluble auto-inhibitor of germination. Subsequently, Shepherd and Mandryk (1963) showed that washing removed materials inhibitory to spore germination from the surfaces of tobacco leaves. It was of interest, therefore, to determine whether the postulated auto-inhibitory materials were, in fact, picked up from the leaf surface during spore removal or were endogenous to conidia and also to examine further the riboflavin requirement of conidia removed from the leaf under more natural conditions than were used previously.

Constitution of the surface lipid from the leaves of Brassica oleracea (var. capitata ( Winnigstadt )) - I. Isolation and quantitative fractionation

1963 ◽  
Vol 158 (973) ◽  
pp. 536-543 ◽  
Keyword(s):  
Brassica Oleracea ◽  
Leaf Surface ◽  
Unit Area ◽  
Surface Lipid ◽  
Chemical Groups

Undamaged cabbage leaves have been subjected to a series of immersions in different solvents. The weight of lipid per unit area of leaf surface has been determined, and the extracts have also been examined by chromatography on films of adsorbent. A representative, uncontaminated sample of the surface lipid can be obtained by immersing the leaves, for 10 s periods, in each of four baths of ether. The surface lipid from the leaves of Brassica oleracea [var. capitata ( Winnigstadt )] has been chromatographically resolved into nine fractions. The proportion of each fraction and the chemical groups it contains have been determined.

scholarly journals Studies on leaf surface lipid of tobacco. IV. Comparisons of epicuticular alkane composition in Nicotiana species.

1981 ◽  
Vol 45 (3) ◽  
pp. 645-652 ◽  
Author(s):  
Kenji GAMOU ◽  
Nobumaro KAWASHIMA
Keyword(s):  
Leaf Surface ◽  
Surface Lipid ◽  
Nicotiana Species

Low temperature x-ray microanalysis of frozen-hydrated tobacco leaves

1984 ◽  
Vol 42 ◽  
pp. 284-285
Author(s):  
S. Edith Taylor ◽  
Patrick Echlin ◽  
May McKoon ◽  
Thomas L. Hayes
Keyword(s):  
Low Temperature ◽  
Lemna Minor ◽  
Root Tips ◽  
Tobacco Leaves ◽  
X Ray ◽  
Whole Cells ◽  
Carbon Coated ◽  
The Right ◽  
Beam Currents ◽  
The University

Low temperature x-ray microanalysis (LTXM) of solid biological materials has been documented for Lemna minor L. root tips. This discussion will be limited to a demonstration of LTXM for measuring relative elemental distributions of P,S,Cl and K species within whole cells of tobacco leaves.Mature Wisconsin-38 tobacco was grown in the greenhouse at the University of California, Berkeley and picked daily from the mid-stalk position (leaf #9). The tissue was excised from the right of the mid rib and rapidly frozen in liquid nitrogen slush. It was then placed into an Amray biochamber and maintained at 103K. Fracture faces of the tissue were prepared and carbon-coated in the biochamber. The prepared sample was transferred from the biochamber to the Amray 1000A SEM equipped with a cold stage to maintain low temperatures at 103K. Analyses were performed using a tungsten source with accelerating voltages of 17.5 to 20 KV and beam currents from 1-2nA.

SOOTY MOULD DISEASES OF SOME TREES FROM AURANGABAD DISTRICT, MAHARASHTRA (INDIA)

2017 ◽  
Vol 23 (2) ◽  
Author(s):  
NAVALSINGH J. TODAWAT
Keyword(s):  
Surface Area ◽  
Fungal Pathogens ◽  
Leaf Surface ◽  
Severity Of Disease ◽  
Sooty Mould ◽  
Leaf Surface Area

Sooty mould diseases of Tress from Aurangabad district were surveyed. During the survey of tress, 5 species were found infected by fungal pathogens causing sooty mould diseases. Disease is easily identifiable by the presence of a black, velvety growth covering the leaf surface area. The fungus produces mycelium which is superficial and dark grows on the flowers, leaf, stem and sometime on fruits also. The severity of disease depends on the honeydew secretions by insects. The diseases were found to be caused by 5 species of fungi viz. Capnodium anonae, C. ramosum, Capnodium sp., Meliola bangalorensis and Meliola ranganthii.

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