Cellulase production was evaluated in two reference strains (T. reesei Rut-C30 and T. reesei QM9414), two strains isolated from a sugarcane cultivation area (Trichoderma sp. IPT778 and T. harzianum rifai IPT821) and one strain isolated in a program for biodiversity preservation in São Paulo state (Myceliophthora thermophila M77). Solid state cultures were performed using sugarcane bagasse (C), ...

Successive transfer in synthetic medium of spores and mycelial fragments from original toxin-producing cultures of Helminthosporium sacchari results in attenuated cultures which do not produce the host-specific toxin helminthosporoside. When attenuated cultures are grown on material obtained from the water wash of sugarcane leaves susceptible to this fungus, the production of heminthosporoside ...

Field and greenhouse studies have confirmed that wattle brush ash may cause marked increases in yield . when sugarcane is grown in certain midland soils. This effect was associated with the following factors: (i) decreased soil acidity (ii) increased P and K uptake by the plant (iii) increased soil exchangeable Ca, Mg, P, K and base saturation values (iv) reduced soil levels of A1 and Mn (v) re...

Introduction Quantitative analysis shows that sucrose is the major organic constituent of phloem exudates in mlost plants (6, 8). When leaves are allowed to photosynthesize in C140, for short periodls nmost of the translocatedl radioactiv,ity is generally found in sucrose (6, 8). With respect to the nature of the transit compound in these plants there are 3 possible hypotheses whiclh are consis...

Partial forest harvesting is known to modify both above- and belowground resource availability and may result in direct and indirect stress to the residual trees as a result of machinery traffic and sudden changes in irradiance. We studied sugar maple (Acer saccharum Marsh.) trees in stands that had undergone a selection harvest 11 years before sampling to verify whether sudden increases in lig...

In the next decade, India is likely to witness changes in its cotton and textile sectors as many of the constraints on production, marketing, and trade of cotton and textile products are set to be eliminated. Some of the internal constraints include export constraints on yarn, government fixing of cotton ginning and pressing fees, and subsidization of raw cotton production. Similarly, one of th...