Natural tolerance of <i>Cuscuta campestris</i> to herbicides inhibiting amino acid biosynthesis

Nadler-Hassar, Talia; Rubin, Baruch

doi:10.1046/j.1365-3180.2003.00350.x

Cited by 36 publications

(36 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…ha has also been found to reduce field dodder in tomato (Mullen et al, 1998). However, some other studies showed a low susceptibility of C. campestris to some sulfonylurea herbicides (Rubin, 1994) and also that C. campestris seeds germinated without a host in herbicide solutions and even showed a certain degree of tolerance to high concentrations of herbicides that are amino acid biosynthesis inhibitors (Nadler-Hassar & Rubin 2003).…”

Section: Field Trialsmentioning

confidence: 99%

“…Photosynthesis-inhibiting herbicides are therefore assumed to have little power in controlling the parasite, while herbicides that inhibit amino acid biosinthesis may affect field dodder growth (NadlerHassar & Rubin, 2003). A fact that supports the assumption of greater sensitivity of field dodder plants to amino acid-inhibiting herbicides is that the parasite has its own independent pathway of biosynthesis of amino acids (Wolswinkel, 1984).…”

Section: Field Trialsmentioning

confidence: 99%

See 1 more Smart Citation

Chemical control of field dodder in alfalfa

et al. 2015

View full text Add to dashboard Cite

SUmmARyParasitic flowering plants have recently come into focus of research interests as a result of their notable expansion and increasing damage that they are causing in agricultural fields. Damage caused by field dodder in alfalfa crops mainly includes reduced yield of fresh biomass and considerable decrease in seed production. Effective control of field dodder in alfalfa crops necessarily includes a number of preventive measures and procedures, as well as chemical control. The effectiveness of glyphosate, propyzamide, imazethapyr and diquat herbicides in controlling field dodder in alfalfa crops was tested in trials conducted in 2011. Pot and field trials were set up in an experimental field of the Institute of Field and Vegetable Crops in Novi Sad (location Rimski Šančevi) and in a private field at Popovići (vicinity of Mladenovac). In pot trials, two glyphosate application rates (288 and 360 g a.i. ha) achieved the highest effectiveness of 95% and 97.5%, respectively. Both application rates of propyzamide (1500 and 2000 g a.i. ha) had weak effectiveness (85% and 87%, respectively), while imazethapyr (150 g a.i. ha) was the weakest herbicide with 80% efficacy. In field trials at both locations, diquat (450 g a.i. ha) showed the best efficacy in controlling field dodder in alfalfa. The efficacy of all other treatments was weaker at Popovići with the following survival rates of field dodder plants: 25% (glyphosate, 288 g a.i. ha), 15% (glyphosate, 360 g a.i. ha), 79% (propyzamide, 1500 g a.i. ha), 70% (propyzamide, 2000 g a.i. ha) and 72% (imazethapyr, 150 g a.i. ha). At the location Rimski Šančevi, the same treatements resulted in around 1% remaining field dodder plants in alfalfa crop.

show abstract

Section: Field Trialsmentioning

confidence: 99%

Section: Field Trialsmentioning

confidence: 99%

Chemical control of field dodder in alfalfa

et al. 2015

View full text Add to dashboard Cite

show abstract

“…We recently demonstrated that Cuscuta pentagona seedlings use plant volatiles to locate and choose among hosts (Runyon et al, 2006). Once a host is located, C. pentagona vines twine around the host stem and produce haustoria, specialized organs that grow into the host to extract nutrients from both xylem and phloem (Dawson et al, 1994 ) and, because of their close physiological connection to hosts, are difficult to control without also impacting the crop plants (Nadler-Hassar and Rubin, 2003). Despite their economic importance and the profound effects they have on host plants and community dynamics, relatively little is known about the defenses induced by parasitic plant attack or how these defenses affect host plant interactions with other organisms.…”

mentioning

confidence: 99%

Parasitism by Cuscuta pentagona Attenuates Host Plant Defenses against Insect Herbivores

2007

View full text Add to dashboard Cite

Considerable research has examined plant responses to concurrent attack by herbivores and pathogens, but the effects of attack by parasitic plants, another important class of plant-feeding organisms, on plant defenses against other enemies has not been explored. We investigated how attack by the parasitic plant Cuscuta pentagona impacted tomato (Solanum lycopersicum) defenses against the chewing insect beet armyworm (Spodoptera exigua; BAW). In response to insect feeding, C. pentagona-infested (parasitized) tomato plants produced only one-third of the antiherbivore phytohormone jasmonic acid (JA) produced by unparasitized plants. Similarly, parasitized tomato, in contrast to unparasitized plants, failed to emit herbivore-induced volatiles after 3 d of BAW feeding. Although parasitism impaired antiherbivore defenses, BAW growth was slower on parasitized tomato leaves. Vines of C. pentagona did not translocate JA from BAW-infested plants: amounts of JA in parasite vines grown on caterpillar-fed and control plants were similar. Parasitized plants generally contained more salicylic acid (SA), which can inhibit JA in some systems. Parasitized mutant (NahG) tomato plants deficient in SA produced more JA in response to insect feeding than parasitized wild-type plants, further suggesting cross talk between the SA and JA defense signaling pathways. However, JA induction by BAW was still reduced in parasitized compared to unparasitized NahG, implying that other factors must be involved. We found that parasitized plants were capable of producing induced volatiles when experimentally treated with JA, indicating that resource depletion by the parasite does not fully explain the observed attenuation of volatile response to herbivore feeding. Collectively, these findings show that parasitic plants can have important consequences for host plant defense against herbivores.

show abstract

“…Moreover, in a recent study we were able to show that when the parasite is grown independently of a host, it can tolerate high concentrations of glyphosate. In addition, application of glyphosate to a parasitized glyphosate-resistant sugar beet host initially injured the parasite, but at a later stage the parasite recovered and resumed normal growth (Nadler-Hassar and Rubin 2003). Collectively, these results indicate that the parasite has some natural mechanism of glyphosate tolerance.…”

Section: Introductionmentioning

confidence: 84%

Glyphosate inhibits the translocation of green fluorescent protein and sucrose from a transgenic tobacco host to Cuscuta campestris Yunk.

Nadler-Hassar

Goldshmidt

Rubin

et al. 2004

Planta

View full text Add to dashboard Cite

The parasitic plant Cuscuta campestris is dependent on its host for water, assimilates and amino acids. It can be controlled by the herbicide glyphosate, which inhibits 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS), resulting in shikimate accumulation. In this study, C. campestris was parasitic on transgenic tobacco plants expressing green fluorescent protein (GFP) in the phloem. Changes in [14C]sucrose and GFP accumulation in the parasite were used as indicators of the herbicide's effect on translocation between the host and parasite. Host plants were treated with glyphosate 22 days after sowing. Shikimate accumulation in the parasite 1 day after glyphosate treatment (DAGT) confirmed EPSPS inhibition in C. campestris. No damage was visible in the host plants for the first 3 DAGT, while during that same time, a significant reduction in [14C]sucrose and GFP accumulation was observed in the parasite. Thus, we propose that the parallel reduction in GFP and sucrose accumulation in C. campestris is a result of a glyphosate effect on the parasite's ability to withdraw assimilates from the host.

show abstract

Natural tolerance of Cuscuta campestris to herbicides inhibiting amino acid biosynthesis

Cited by 36 publications

References 22 publications

Chemical control of field dodder in alfalfa

Chemical control of field dodder in alfalfa

Parasitism by Cuscuta pentagona Attenuates Host Plant Defenses against Insect Herbivores

Glyphosate inhibits the translocation of green fluorescent protein and sucrose from a transgenic tobacco host to Cuscuta campestris Yunk.

Contact Info

Product

Resources

About