The Effects of Herbicides Targeting Aromatic and Branched Chain Amino Acid Biosynthesis Support the Presence of Functional Pathways in Broomrape.

It is not clear why herbicides targeting aromatic and branched-chain amino acid biosynthesis successfully control broomrapes-obligate parasitic plants that obtain all of their nutritional requirements, including amino acids, from the host. Our objective was to reveal the mode of action of imazapic and glyphosate in controlling the broomrape and clarify if this obligatory parasite has its own machinery for the amino acids biosynthesis. callus was studied to exclude the indirect influence of the herbicides on the parasite through the host plant.

Metabolic Investigation of Reveals Significant Changes during Developmental Stages and in Its Different Organs.

Pers. is a root holoparasitic plant considered to be among the most destructive agricultural weeds worldwide. In order to gain more knowledge about the metabolic profile of the parasite during its developmental stages, we carried out primary metabolic and lipid profiling using GC-MS analysis.

Hyperspectral Technologies for Assessing Seed Germination and Trifloxysulfuron-methyl Response in (Palmer Amaranth).

Weed infestations in agricultural systems constitute a serious challenge to agricultural sustainability and food security worldwide. S. Watson (Palmer amaranth) is one of the most noxious weeds causing significant yield reductions in various crops.

Secondary Effects of Glyphosate Action in : Inhibition of Solute Transport from the Host Plant to the Parasite.

It is currently held that glyphosate efficiently controls the obligate holoparasite (Egyptian broomrape) by inhibiting its endogenous shikimate pathway, thereby causing a deficiency in aromatic amino acids (AAA). While there is no argument regarding the shikimate pathway being the primary site of the herbicide's action, the fact that the parasite receives a constant supply of nutrients, including proteins and amino acids, from the host does not fit with an AAA deficiency. This apparent contradiction implies that glyphosate mechanism of action in is probably more complex and does not end with the inhibition of the AAA biosynthetic pathway alone.