Auxin regulates a variety of physiological and developmental processes in plants. Although auxin acts as a suppressor of leaf senescence, its exact role in this respect has not been clearly defined, aside from circumstantial evidence. It was found here that ARF2 functions in the auxin-mediated control of Arabidopsis leaf longevity, as discovered by screening EMS mutant pools for a delayed leaf ...

The Moduleaf, an add-on miniature multileaf collimator (MMLC) for the Siemens Oncor linear accelerator, provides high resolution field shaping with a maximum inter-leaf leakage dose of 1.50% at 6 MV. However, beyond the maximum treatment field size, the distribution of leakage and scatter along the y axis is different from that of the x axis, with maximum leakage values of 1.53% and 0.39%, resp...

the production of reactive oxygen species (ros) in plants under low temperature stress cause damage to plants. in order to evaluate of antioxidant responses of page mandarin young trees (two years old) on different rootstocks under low temperatures, an experiment was conducted in a factorial plan based on completely randomized design. treatment of temperatures were at seven levels include 9, 6,...

A simple and robust ultrafast, high-peak-power 5-μm laser source for pumping a dielectric photonic structure for high-gradient electron acceleration has been designed and is being constructed. The 5-μm laser source consists of two components: (1) a type-II-BBO-based 2.05-μm optical parametric amplifier (OPA) as a pump source, and (2) a type-I-ZGP-based 5-μm OPA to produce mJ-class, <100 fs puls...

due to physiological disorder, primary bud necrosis (pbn) in grapevine is a great problem in vineyards, resulting in reduced yield. primary bud necrosis (pbn) is physiological disorder resulting in the death of the primary bud. the present study conducted through a light on this critical problem in a vineyard of cisakht region. a factorial experiment with three levels of cold temperature (-10, ...

Proof. As presented in Section IV.A, the querying process for r(x) in T is a traversal process over T . Assuming for each interval Int of T , there exists a parameter μ that satisfies |I| − μ ≤ |A| ≤ |I|. Thus, the total error introduced by the traversal process from the sink to the leaf node is O(hμ) where h is the height of T . Thus, the total error of querying any r(x) in T is O(hμ+ |Mj |/β)...

iran is among the world&apos;s arid and semi-arid countries. drought stress is one of the most important environmental stresses affecting fruit trees and considerably can cause yield reduction. persian walnut (juglans regia l.) with significant area harvest is one the most important nuts in iran which require sufficient amounts of water for optimal growth and efficiency. in order to study the e...