drought stress is a major factor limiting crop production. investigation of physiological characteristics related to drought tolerance and crop production may be useful in selecting drought tolerant cultivars as well as in improving crop yield. two drought tolerant (azar2 & back cross roshan) and two drought susceptible (marvdast & shiraz) cultivars were investigated in both greenhouse and fiel...

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The orphan crop, Eragrostis tef, was subjected to controlled drought conditions to observe the physiological parameters and proteins changing in response to dehydration stress. Physiological measurements involving electrolyte leakage, chlorophyll fluorescence and ultra-structural analysis showed tef plants tolerated water loss to 50% relative water content (RWC) before adverse effects in leaf t...

We investigated the photosynthetic limitations occurring during dehydration and rehydration of Xerophyta humilis, a poikilochlorophyllous resurrection plant, and whether volatile and non-volatile isoprenoids might be involved in desiccation tolerance. Photosynthesis declined rapidly after dehydration below 85% relative water content (RWC). Raising intercellular CO(2) concentrations during desi...

For the first time novel high-energy conformers-A·T(wWC) (5.36), A·T(wrWC) (5.97), A·T(wH) (5.78), and A·T(wrH) (ΔG = 5.82 kcal·mol-1) (See Graphical Abstract) were revealed for each of the four biologically important A·T DNA base pairs - Watson-Crick A·T(WC), reverse Watson-Crick A·T(rWC), Hoogsteen A·T(H) and reverse Hoogsteen A·T(rH) at the MP2/aug-cc-pVDZ//B3LYP/6-311++G(d,p) level of quant...

The estimation of thermodynamic behavior during filling processes with entrapped air in water pipelines is a complex task as it requires solving system algebraic-differential equations. A lot different numerical methods have been used for this purpose literature including the rigid column (RWC) model. main advantage RWC model its acceptable accuracy very low computational load. In that context,...

Some cucurbit plants (Cucumis sativus L., Cucurbita pepo Cucumis melo L. and Citrillus lanatus L.) were used for investigating some physiological changes protein patterns under heat stress in plants. Leaf samples exposed tohigh temperatures as follows 35, 40, 45, 50, 55 60°C. Percentage of ion leakage, chlorophyll content, leaf relative water content (RWC) loss turgidity, total soluble (TSP) pr...

Sea lice infestations have become a major health problem for farmed salmonids throughout the world including Chile. In southern Chile, 6 geographical areas, divided into 22 geographical zones with a total of 127 salmon farming centers and 1519 sea pens, were regularly sampled from December 1999 to April 2002. A linear mixed-effects model (LME) approach was used to describe the infestations of a...

The authors present a simple classroom experiment that can be used as a teaching device to introduce important concepts of organizational economics and incentive contracting. First, students take the role of a principal and design a contract that consists of a fixed payment and an incentive component. Second, students take the role of agents and decide on an effort level. The experiment illustr...

Understanding of joint dysfunction requires some knowledge of normality and the comparison of the diseased state to the physiologic situation (Fig. 173.2). The most important requirements for normal joint function are the freedom of the opposed articular surfaces to move pain free—and largely frictionlessly—over each other within the required range of motion as well as the correct distribution ...