How plants respond to density via modular plasticity is obscure, probably because relevant studies using covariance analysis (ANCOVA) and allometric rarely focus on multiple stages of plant growth, also the two approaches are seldom used simultaneously. In this study, a field experiment evaluated effects three levels resource allocation traits in Abutilon theophrasti tested degree which these w...

Natural products are one of the resources for discovering novel pesticide leads. Here, by molecular hybridization between natural enamino diketone skeleton and reported herbicide lead compound I, a series 3-(1-aminoethylidene)-6-methyl-2H-pyran-2,4(3H)-dione derivatives (APD) were rationally designed, synthesized tested herbicidal activity in greenhouse. The bioassay results showed that most ta...

A reduction in leaf stomatal conductance (g) with increasing leaf-to-air difference in water vapour pressure (D) is nearly ubiquitous. Ecological comparisons of sensitivity have led to the hypothesis that the reduction in g with increasing D serves to maintain leaf water potentials above those that would cause loss of hydraulic conductance. A reduction in leaf water potential is commonly hypoth...

A physical method is described for the rapid isolation of plant trichomes, with emphasis on stalked glandular types. The technique involved breaking frozen trichomes with powdered dry ice and collection of glandular heads by sieving from larger tissue fragments. This method was applied to several plants that bear similar stalked trichomes: geranium (Pelargonium), potato (Solanum tuberosum), tom...

Plant fibers are sustainable sources of materials for many industries, and can be obtained from a variety plants. Cellulose is the main constituent plant-based fibers, its properties give characteristics obtained. Detailed characterization cellulosic often performed after lengthy extraction procedures, while fast screening might bring benefit quick qualitative assessment unprocessed stems. The ...

Eighteen volatile monoterpenes, which are among the major constituents of essential oils from plants, were screened for phytotoxicity to several crop and weed species. Several monoterpenes containing an oxygen function severely inhibited germination of four different annual weeds while concurrently displaying little effect on soybean germination. Soybeans varied in their sensitivity to various ...

The reactivity o f the bleaching herbicide clom azone with reduced glutathione (GSH) was studied under in vitro conditions. C lom azone at 1.3 m M and GSH a t 100 m M were reacted in a phosphate buffer (pH 8.8) at 25 CC for 3 days. The resulting synthetic product was identified as a G S-conjugate o f clom azone by means o f TLC , H PLC , and mass spectrom etry (chemical ionization) procedures. ...

Seed dormancy is an important trait that contributes to the survival rate of weeds, helps avoid effects herbicides and protects them against adverse environmental conditions. In order determine which methods are effective in breaking seed invasive weed species (Ambrosia artemisiifolia, Abutilon theophrasti, Xanthium strumarium), experiment was set up 2019 a randomized block design, with three r...