| leaf vasculature in sugarcane (saccharum officinarum l.). | the vascular system of the leaves of saccharum officinarum l. is composed in part of a system of longitudinal strands that in any given transverse section may be divided into three types of bundle according to size and structure: small, intermediate, and large. virtually all of the longitudinal strands intergrade, however, from one type bundle to another. for example, virutually all of the strands having large bundle anatomy appear distally in the blade as small bundles, which intergrade into in ... | 1982 | 24272309 |
| purification and properties of alpha-galactosidase from immature stalks of saccharum officinarum (sugar cane). | the immature sugar cane stalks studied contained less than 7% sucrose, and showed the activities of enzymes such as invertase, alpha-galactosidase, alpha-mannosidase, beta-n-acetylglucosaminidase, beta-glucosidase, beta-xylosidase, and beta-galactosidase. the alpha-galactosidase was highly purified by ammonium sulfate fractionation, gel filtration on a sephadex g-100 column, ionexchange chromatography on deae-cellulose, and cm-cellulose columns, and heat treatment (60 degrees c, 15 min) in the p ... | 1981 | 6279579 |
| effect of sugars and amino acids on membrane potential in two clones of sugarcane. | sugarcane (saccharum officinarum l.) leaf parenchyma cells bathed in 1x solution maintained an average membrane potential of -135 millivolts in the dark. no difference in membrane potential was found between clones 51 ng 97 and h50 7209. an electrogenic pump appears to contribute to membrane potential in these cells. sugars (25 millimolar) added externally caused the following membrane potential depolarizations (in millivolts) in clone 51 ng 97: glucose, 18 +/- 4; galactose, 24 +/- 7; 3-o-methyl ... | 1981 | 16661617 |
| observations on pre-prophase bands of microtubules in uniseriate hairs, stomatal complexes of sugar cane, and cyperus root meristems. | three aspects of the location and properties of pre-prophase bands of microtubules inplant tissues were examined. (i) anatomical locations: pre-prophase bands were found preceding mitosis in the basal meristematic cell of uniseriate hairs in salvinia auriculata and in intercalary dividing cells in the uniseriate hairs of tradescantia stamens. previously they had only been found in 2- or 3-dimensional aggregates of cells. other new locations were tradescantia stamen filaments, and periclinal and ... | 1980 | 7398662 |
| inhibition of photosynthetic electron transport in isolated spinach chloroplasts by two 1,3,4-thiadiazolyl derivatives. | buthidazole (3-[5-(1,1-dimethylethyl)-1,3,4-thiadiazol-2-yl]-4-hydroxy-1-methyl-2-imidazolidinone) and tebuthiuron (n-[5-(1,1-dimethylethyl)-1,3,4-thiadiazol-2-yl]-n,n'-dimethylurea) are two new promising herbicides for selective weed control in corn (zea mays l.) and sugarcane (saccharum officinarum l.), respectively. the effects of these two compounds on various photochemical reactions of isolated spinach (spinacia oleracea l.) chloroplasts were studied at concentrations of 0, 0.05, 0.5, 5, an ... | 1980 | 16661181 |
| microbial activity in organic soils as affected by soil depth and crop. | the microbial activity of pahokee muck, a lithic medisaprist, and the effect of various environmental factors, such as position in the profile and type of plant cover, were examined. catabolic activity for [7-c]salicylic acid, [1,4-c]succinate, and [1,2-c]acetate remained reasonably constant in surface (0 to 10 cm) soil samples from a fallow (bare) field from late in the wet season (may to september) through january. late in january, the microbial activity toward all three compounds decreased ap ... | 1979 | 16345393 |
| a survey for isoenzymes of glucosephosphate isomerase, phosphoglucomutase, glucose-6-phosphate dehydrogenase and 6-phosphogluconate dehydrogenase in c3-, c 4-and crassulacean-acid-metabolism plants, and green algae. | two isoenzymes each of glucosephosphate isomerase (ec 5.3.1.9), phosphoglucomutase (ec 2.7.5.1), glucose-6-phosphate dehydrogenase (ec 1.1.1.49) and 6-phosphogluconate dehydrogenase (ec 1.1.1.43) were separated by (nh4)2so4 gradient solubilization and deae-cellulose ion-exchange chromatography from green leaves of the c3-plants spinach (spinacia oleracea l.), tobacco (nicotiana tabacum l.) and wheat (triticum aestivum l.), of the crassulacean-acid-metabolism plants crassula lycopodioides lam., b ... | 1979 | 24317570 |
| localization of the c4 and c 3 pathways of photosynthesis in the leaves of pennisetum purpureum and other c4 species. insignificance of phenol oxidase. | mesophyll protoplasts and bundle-sheath cells of pennisetum purpureum schum., a c4 plant with low phenol-oxidase activity, were enzymatically separated according to methods recently developed with sugarcane (saccharum officinarum l.), maize (zea mays l.), and sorghum (sorghum bicolor l.). the phosphoenolpyruvate carboxylase and nadp-malic dehydrogenase of the c4 pathway were found to be localized in the mesophyll protoplasts while ribulose-1,5-diphosphate (rudp) carboxylase, phosphoribulokinase ... | 1974 | 24442563 |
| sugar accumulation in sugarcane: carrier-mediated active transport of glucose. | the rate-limiting reaction for glucose uptake in storage tissue of sugarcane, saccharum officinarum l., appears to be the movement of glucose across the boundary between the free space and the metabolic compartments. the mechanism for uptake of glucose across this boundary has been studied using 3-o-methyl glucose, an analogue of glucose which is not metabolized by sugar-cane tissue.this analogue is taken up by sugarcane storage tissue at a similar rate to glucose. its rate of uptake follows mic ... | 1972 | 16658002 |
| sugar transport in immature internodal tissue of sugarcane: i. mechanism and kinetics of accumulation. | transmembrane sugar transport into immature internodal parenchyma tissue of sugarcane (saccharum officinarum l.) is a metabolically regulated process as evidenced by its sensitivity to ph, temperature, anaerobiosis, and metabolic inhibitors. all sugars studied-glucose, fructose, galactose, sorbose, glucose 6-phosphate, 3-o-methylglucose, and 2-deoxy-d-glucose-were apparently transported via the same carrier sites since they competed with each other for uptake. external concentrations of these su ... | 1972 | 16657901 |
| absorption of copper, zinc, and manganese by sugarcane leaf tissue. | the absorption of cu(2+), zn(2+), and mn(2+) by leaf tissue of 4-month old sugarcane plants (saccharum officinarum l., var. h53-263) has been investigated. after the "apparent free space" fraction was desorbed, the absorption of cu(2+), mn(2+), and zn(2+) yielded a curve typical of many ion uptake processes when measured as a function of the external concentration. however, only 1 absorption mechanism was evident for each cation. the ph optimum for cu(2+) and zn(2+) uptake was 5.0 to 6.0, wherea ... | 1969 | 16657055 |
| quantitative genetics of sugarcane : ii. correlation analysis of continuous characters in relation to hybrid sugarcane breeding. | 1. a study has been made of the genetic, clonal and environmental correlations existing among commercially important characters in a sugarcane breeding population of interspecific hybrid origin. 2. in general, there is a close correspondence between genetic correlation coefficients measuring the extent of association at the level of family means, and clonal correlations measuring genotypic relationships at the level of clone means. greater weight has therefore been given to the numerical estimat ... | 1969 | 24435213 |
| origin of noble sugar-canes (saccharum officinarum l.). | | 1948 | 18916834 |