SapB and the rodlins are required for development of Streptomyces coelicolor in high osmolarity media

Streptomyces coelicolor produces spore-forming aerial hyphae after a period of vegetative growth. These aerial structures are decorated with a hydrophobic coating of rodlets consisting of chaplins and rodlins. Here, we show that rodlins and the surface-active peptide SapB are essential for development during growth in a medium with high osmolarity. To this end, both vegetative and aerial hyphae secrete SapB, whereas rodlins are only secreted by the spore-forming aerial hyphae.

Monitoring vegetation cover on mine dumps with ERTS-1 imagery: Some initial results

ERTS-1 imagery is being used in an attempt to differentiate between mine dumps having varying degrees of vegetative cover. At this stage it is clear that the various mine dumps can be located and identified. Differences in vegetative cover can be seen and measured. Patterns of vegetative growth, some characteristic to particular dumps, can also be seen. It is therefore tentatively concluded that mine dumps can be differentiated with respect to their vegetative cover on the imagery received to date. Subsequent imagery showing seasonal variations should facilitate this program

Vegetative Growth, Fruit Set, Yield and Fruit Quality of "Le-Conte" Pear Grown Under Calcareous Soil Conditions as Affected by Different Levels of Nitrogen, Phosphorus and Potassium

"Le-Conte" pear fruiting trees grown in newly reclaimed soils were fertilized with different levels of nitrogen, phosphorus and potassium fertilization during three successive seasons of 2006, 2009 and 2010. However, results were calculated for the two seasons of 2009 and 2010. Tree vegetative growth (shoot length and diameter and leaf area), fruit set, yield increased significantly with increasing fertilization level. Fruit quality was increased significantly with increasing fertilization rate. The results also indicated that increasing N, P and K fertilization level lead to a gradual increment in leaf N, P and k content. Total sugars in fruits increased significantly with increasing the fertilization levels. On the other hand, starch decreased gradually with increasing the fertilization levels. The most effective level (650g. Ammonium nitrate + 325g. Potassium sulphate + 600g. Calcium superphosphate) leads to the highest vegetative growth, mineral leaf content, fruit yield and the best fruit quality as compared with other levels of fertilization. The lowest vegetative growth, yield and fruit weight and dimensions were recorded at the lowest level (250g. Ammonium nitrate + 125g. Potassium sulphate + 200g. Calcium superphosphate)

Effects of the inoculation with arbuscular mycorrhizal (AM) fungus of the genus Glomus on growth and leaf mineral concentrations of grapevine (Vitis vinifera cv. Cabernet Sauvignon)

The effects of root inoculation with mycorrhizal fungi (genus Glomus) on growth and leaf mineral concentrations of grapevine (Vitis vinifera cv. Cabernet Sauvignon) were studied under the growth conditions of Central Chile. Inoculation enhanced the uptake of N and K and vegetative growth but decreased the foliar concentration, but not necessarily the uptake of P

Climate-Related Floral and Vegetative Size Variation in Leptosiphon androsaceus (Polemoniaceae)

Phenotypic plasticity in plants is a vital adaptive response to changing environmental conditions. Floral and vegetative morphology often varies as biotic and abiotic factors vary. Variation is the basis of evolution, and natural selection, acting on trait variation, can lead to speciation. For this study, floral and vegetative character traits of false babystars (Leptosiphon androsaceus, Polemoniaceae) were analyzed within four populations at Henry W. Coe State Park in 2011. Traits were measured to assess changes in size along a moisture availability gradient. Stable carbon isotope ratio samples were collected to measure integrated water-use efficiency (WUE) as it related to precipitation and floral size. Sizes of floral and vegetative characters varied significantly between the drier and wetter regions. Floral and vegetative character sizes for L. androsaceus decreased from the wetter to the drier region. The ratio of floral area/leaf area increased as precipitation decreased, suggesting that leaves may have incurred a physiological cost from floral growth within the drier region. A difference in WUE, as it related to trait size and precipitation, was not found for this study year. These results provide evidence that floral and vegetative characters of L. androsaceus vary in size in response to water-limiting conditions

Controlled Ecological Life Support Systems: CELSS 1985 Workshop

Various topics related to closed ecological systems are discussed. Space habitats, vegetative growth, photosynthesis, recycling, culture techniques, waste utilization bioreactors and controlled atmospheres on space stations are among the topics covered

Response of Wheat to Nano fertilizers Added at the Beginning of the Vegetative and Flowering Growth Stages

A field experiment was carried out during the winter season 2023-2024 in the Al-Galibiya area of Al-Khalis District in Diyala Governorate in a mixed sandy soil, salinity 4.5 dM/m, pH 7.6, organic matter 21%, and ready-made nitrogen, phosphorus and potassium 26.9, 29.0 and 126.8 mg/kg. Sequentially, with the aim of determining the extent of wheat crop response to nanotechnology during the vegetative and flowering growth stages , using some nanofertilizers to improve growth and develop the production of this strategic crop.A factorial experiment was applied according to a Randomized Complete Block Design (RCBD) with three replicates. The first factor included fertilizer treatments (urea nanofertilizer and NPK nanofertilizer at a concentration of 60 g each, and traditional urea fertilizer and NPK traditional fertilizer at a concentration of 100 kg/ha each) as well as the control treatment, while Addition dates parameters (the beginning of the vegetative growth stage, the beginning of the flowering growth stage, and the beginning of both the vegetative and flowering growth stages) represented the second factor. The use of the traditional fertilizer urea led to the highest plant height when added at the beginning of the vegetative growth stage and the beginning of the vegetative and flowering growth stages, as it reached 104.2 and 102.9 cm, respectively’. The use of nanofertilizer urea at the beginning of the vegetative and flowering growth stages resulted in the highest number of tillers, reaching 373.06 tillers/m², and it did not differ significantly from the treatment of using nanofertilizer urea at the beginning of the vegetative growth stage, which achieved 366.50 tillers /m²

Process for producing vegetative and tuber growth regulator

A process of making a vegetative and tuber growth regulator. The vegetative and tuber growth regulator is made by growing potato plants in a recirculating hydroponic system for a sufficient time to produce the growth regulator. Also, the use of the vegetative and growth regulator on solanaceous plants, tuber forming plants and ornamental seedlings by contacting the roots or shoots of the plant with a sufficient amount of the growth regulator to regulate the growth of the plant and one more of canopy size, plant height, stem length, internode number and presence of tubers in fresh mass. Finally, a method for regulating the growth of potato plants using a recirculating hydroponic system is described

Pengaruh Infeksi Tmv (Tobacco Mosaic Virus) Terhadap Pertumbuhan Vegetatif Dan Generatif Beberapa Varietas Cabai Merah (Capsicum Annuum L.)

Influence of tobacco mosaic virus infection to vegetative and generative growth of various hot pepper varieties (Capsicum annuum L.). This experiment was conducted to investigate the effect of TMV infection on vegetative and generative growth of various hot pepper varieties. Treatments were arranged in completely randomized design in split plot experiment with four replications. Mainplots were virus-inoculated and uninoculated plants; subplots were three hot pepper varieties: Cimerti, HP-Typhoon, and HP-Tornado. The results of the experiment showed that TMV infection caused decrease vegetative and generative growth. The decrease of vegetative and generative growth indicated by the reduction of leaf width, plant height, and yield. HP-Tornado and Cimerti varieties showed susceptible reaction proved by significant reduction of the growth and yield; HP-Typhoon was tolerance reaction to TMV infection indicated by significant reduction of the growth and lowest reduction of the yield