חיפוש מתקדם
Weed Research
Nadler-Hassar, T., Fac. Agric., Food Environ. Qual. S., R. H. Smith Inst. Plant Sci. Genet., Hebrew University of Jerusalem, Rehovot 76100, Israel
Rubin, B., Fac. Agric., Food Environ. Qual. S., R. H. Smith Inst. Plant Sci. Genet., Hebrew University of Jerusalem, Rehovot 76100, Israel
The response of Cuscuta campestris Yuncker, a non-specific above-ground holoparasite, to amino acid biosynthesis inhibitor (AABI) herbicides, was compared with other resistant and sensitive plants in dose-response assays carried out in Petri dishes. Cuscuta campestris was found to be much more resistant to all AABI herbicides tested. The I50 value of C. campestris growth inhibition by glyphosate was eightfold higher than that of transgenic, glyphosate-resistant cotton (RR-cotton). The I50 value for C. campestris shoot growth inhibition by sulfometuron was above 500 μM, whereas that of sorghum roots was only 0.004 μM. Cuscuta campestris exposed to glyphosate gradually accumulated shikimate, confirming herbicide penetration into the parasite and interaction with an active form of the target enzyme of the herbicide, 5-enolpyruvylshikimate-3-phosphate synthase. More than half of the C. campestris plants associated with transgenic, glyphosate-resistant sugarbeet (RR-sugarbeet) treated with glyphosate or with transgenic, sulfometuron-resistant tomato (SuR-tomato) treated with sulfometuron recovered and resumed regular growth 20-30 days after treatment. New healthy stems developed, followed by normal flowering and seed setting. The results of the current study demonstrate the unique capacity of C. campestris to tolerate high rates of AABI. The mechanism of this phenomenon is yet to be elucidated.
פותח על ידי קלירמאש פתרונות בע"מ -
הספר "אוצר וולקני"
אודות
תנאי שימוש
Natural tolerance of Cuscuta campestris to herbicides inhibiting amino acid biosynthesis
43
Nadler-Hassar, T., Fac. Agric., Food Environ. Qual. S., R. H. Smith Inst. Plant Sci. Genet., Hebrew University of Jerusalem, Rehovot 76100, Israel
Rubin, B., Fac. Agric., Food Environ. Qual. S., R. H. Smith Inst. Plant Sci. Genet., Hebrew University of Jerusalem, Rehovot 76100, Israel
Natural tolerance of Cuscuta campestris to herbicides inhibiting amino acid biosynthesis
The response of Cuscuta campestris Yuncker, a non-specific above-ground holoparasite, to amino acid biosynthesis inhibitor (AABI) herbicides, was compared with other resistant and sensitive plants in dose-response assays carried out in Petri dishes. Cuscuta campestris was found to be much more resistant to all AABI herbicides tested. The I50 value of C. campestris growth inhibition by glyphosate was eightfold higher than that of transgenic, glyphosate-resistant cotton (RR-cotton). The I50 value for C. campestris shoot growth inhibition by sulfometuron was above 500 μM, whereas that of sorghum roots was only 0.004 μM. Cuscuta campestris exposed to glyphosate gradually accumulated shikimate, confirming herbicide penetration into the parasite and interaction with an active form of the target enzyme of the herbicide, 5-enolpyruvylshikimate-3-phosphate synthase. More than half of the C. campestris plants associated with transgenic, glyphosate-resistant sugarbeet (RR-sugarbeet) treated with glyphosate or with transgenic, sulfometuron-resistant tomato (SuR-tomato) treated with sulfometuron recovered and resumed regular growth 20-30 days after treatment. New healthy stems developed, followed by normal flowering and seed setting. The results of the current study demonstrate the unique capacity of C. campestris to tolerate high rates of AABI. The mechanism of this phenomenon is yet to be elucidated.
Scientific Publication
You may also be interested in