Geminivirus Resistance Strategies

Geminiviruses ◽  
2019 ◽  
pp. 197-218 ◽  
Author(s):  
Abhinav Kumar ◽  
Jawaid A. Khan
2013 ◽  
Author(s):  
Amanda K. Gilmore ◽  
Mehjabeen Khan ◽  
Sheila Ghods ◽  
Melissa A. Lewis ◽  
William H. George

Plants ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 988
Author(s):  
Charlotte Descamps ◽  
Najet Boubnan ◽  
Anne-Laure Jacquemart ◽  
Muriel Quinet

Drought and higher temperatures caused by climate change are common stress conditions affecting plant growth and development. The reproductive phase is particularly sensitive to stress, but plants also need to allocate their limited resources to produce floral traits and resources to attract pollinators. We investigated the physiological and floral consequences of abiotic stress during the flowering period of Impatiens glandulifera, a bee-pollinated species. Plants were exposed to three temperatures (21, 24, 27 °C) and two watering regimes (well-watered, water stress) for 3 weeks. Not all parameters measured responded in the same manner to drought and/or heat stress. Drought stress induced leaf senescence, decreasing leaf number by 15–30% depending on growth temperature. Drought also reduced photosynthetic output, while temperature rise affected stomatal conductance. The number of flowers produced dropped 40–90% in response to drought stress, while higher temperatures shortened flower life span. Both stresses affected floral traits, but flower resources diminished in response to higher temperatures, with lower nectar volume and pollen protein content. We conclude that increased temperatures and drought stress, which are becoming more frequent with climate change, can negatively affect flowering, even if plants deploy physiological resistance strategies.


2021 ◽  
pp. 089692052110282
Author(s):  
Alexei Anisin

This article reinforces the criticisms I cast on civil resistance literature in my study “Debunking the Myths Behind Nonviolent Civil Resistance” through addressing issues on how scholars code violence, unarmed violence, and nonviolence. It justifies studying unarmed violence as a sole category and explicates the pathways through which unarmed violence can lead oppositional campaigns toward success. In responding to Onken, Shemia-Goeke, and Martin, the article demonstrates that the dichotomization of nonviolence and violence is not premised on analytical equivalency and should be avoided if the study of resistance strategies is to progress onward and step away from the literature's intrinsic ideological bias. There is nothing idealistic about seeking to improve how we operationalize concepts to study resistance strategies, but if scholars in the civil resistance literature fail to move away from universalistic assumptions about nonviolence and social change, they will continue to misinterpret historical processes and produce policy suggestions that are neo-colonial in nature.


2021 ◽  
Vol 52 (5) ◽  
pp. 482-508
Author(s):  
Kimmika Williams-Witherspoon

Following the murders of George Floyd, Breonna Taylor and so many others, recent protest in Minneapolis, New York, Philadelphia, Chicago, Washington, DC, LA, Portland and a host of other locations, both, stateside and abroad are being framed in the public discourse as everything from radical resistance to public madness and everything in between. From the Black Lives Matter movement activist to Diversity, Equity, and Inclusion advocates, one of the key components in, both, radical resistance strategies or public expressions of cultural madness, is a ground swelling of rage! But what is rage? How can we recognize it? Historically, what has been the consequences of Black rage? And in this unique, historical moment, what if anything can be done to leverage it? Mining August Wilson’s work for definitions, instances, and consequences of Black rage, this paper interrogates August Wilson’s narratives on rage as a way to talk about the historiography and commodifying of Black rage as a way of victimizing and disposing of Black bodies in America. In this way, we hope to offer suggestions in this historical moment on how to leverage Black rage, rather than to be snared by it.


Author(s):  
Thomas Assinger ◽  
Stefano F. F. Torriani ◽  
Salvatore Accardo ◽  
James Fountaine ◽  
Siegrid Steinkellner

AbstractRamularia collo-cygni B. Sutton and J.M. Waller is a major disease in Austrian barley-growing regions. To date, fungicide application is the most effective method to manage the disease; however, fungicide resistance to demethylation and succinate dehydrogenase inhibitors has developed over the last few years. In the growing seasons 2016/2017 and 2017/2018, field trials were carried out to analyze the efficiency of fungicide strategies based on different fungicide classes. Disease development, growth parameters and monitoring of CYP51 and sdh mutations were determined. Fungicide treatments resulted in higher disease control, green leaf area and grain yield. In Austrian R. collo-cygni field populations, the frequency of the mutations CYP51-I325T and CYP51-I328L was low to moderate. Frequency of mutations sdhC-H146R and sdhC-H153R was low. Frequencies of CYP51-I325T and -I328L were similar and increased following DMI application. Frequency of sdhC-H146R was higher compared to sdhC-H153R. The SDHI benzovindiflupyr showed a higher selection rate for sdh mutations compared to bixafen. These sdh mutations were not selected if chlorothalonil was used as mixing partner, leading to a stable composition of sdh resistance alleles over the last two years. Chlorothalonil was proven to be an effective tool for anti-resistance strategies. Currently, SDHIs and DMIs are the backbone of Ramularia leaf spot control in Austria; however, the level of resistance is likely to increase in absence of suitable anti-resistance strategies and following the ban of chlorothalonil.


2013 ◽  
Vol 15 (4) ◽  
pp. 568-574 ◽  
Author(s):  
Scott K. Okamoto ◽  
Suzanne Pel ◽  
Susana Helm ◽  
Jessica K. Valdez

Agronomy ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 824
Author(s):  
Fredy P. Carrera ◽  
Carlos Noceda ◽  
María G. Maridueña-Zavala ◽  
Juan M. Cevallos-Cevallos

Metabolomics is a technology that generates large amounts of data and contributes to obtaining wide and integral explanations of the biochemical state of a living organism. Plants are continuously affected by abiotic stresses such as water scarcity, high temperatures and high salinity, and metabolomics has the potential for elucidating the response-to-stress mechanisms and develop resistance strategies in affected cultivars. This review describes the characteristics of each of the stages of metabolomic studies in plants and the role of metabolomics in the characterization of the response of various plant species to abiotic stresses.


2011 ◽  
Vol 32 (3-4) ◽  
pp. 185-193 ◽  
Author(s):  
Scott K. Okamoto ◽  
Susana Helm ◽  
Justin A. Delp ◽  
Kristina Stone ◽  
Ay-Laina Dinson ◽  
...  

Oecologia ◽  
1997 ◽  
Vol 110 (4) ◽  
pp. 576-583 ◽  
Author(s):  
Jacques Gignoux ◽  
Jean Clobert ◽  
Jean-Claude Menaut

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