Cytokinins for immunity beyond growth, galls and green islands

Naseem, Muhammad; Wölfling, Mirko; Dandekar, Thomas

doi:10.1016/j.tplants.2014.04.001

Cited by 74 publications

(56 citation statements)

References 15 publications

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“…Historically, CKs are associated with disease symptoms and morphological anomalies, such as fasciation, senescence, and the formation of galls, tumors and so-called ‘green islands’ (Grant and Jones, 2009). Many fungal and bacterial pathogens can produce CK themselves and/or increase CK synthesis in plants (Siemens et al, 2006; Walters et al, 2008; Naseem et al, 2014). Moreover, pathogens may also activate plant CK signaling in order to suppress host immunity.…”

Section: New Kids On the Block: Developmental Hormones Do Defensementioning

confidence: 99%

“…Although these observations indicate a role of CKs in promoting pathogen virulence, recent work has revealed that CKs can also augment plant immunity against a fairly broad range of pathogens exhibiting different lifestyles (Swartzberg et al, 2008; Grosskinsky et al, 2011; Argueso et al, 2012; Naseem et al, 2012, 2014). Argueso et al (2012) argued that the levels of CK are important in determining the amplitude of plant immunity.…”

Section: New Kids On the Block: Developmental Hormones Do Defensementioning

confidence: 99%

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Making sense of hormone-mediated defense networking: from rice to Arabidopsis

2014

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Phytohormones are not only essential for plant growth and development but also play central roles in triggering the plant immune signaling network. Historically, research aimed at elucidating the defense-associated role of hormones has tended to focus on the use of experimentally tractable dicot plants such as Arabidopsis thaliana. Emerging from these studies is a picture whereby complex crosstalk and induced hormonal changes mold plant health and disease, with outcomes largely dependent on the lifestyle and infection strategy of invading pathogens. However, recent studies in monocot plants are starting to provide additional important insights into the immune-regulatory roles of hormones, often revealing unique complexities. In this review, we address the latest discoveries dealing with hormone-mediated immunity in rice, one of the most important food crops and an excellent model for molecular genetic studies in monocots. Moreover, we highlight interactions between hormone signaling, rice defense and pathogen virulence, and discuss the differences and similarities with findings in Arabidopsis. Finally, we present a model for hormone defense networking in rice and describe how detailed knowledge of hormone crosstalk mechanisms can be used for engineering durable rice disease resistance.

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Section: New Kids On the Block: Developmental Hormones Do Defensementioning

confidence: 99%

Section: New Kids On the Block: Developmental Hormones Do Defensementioning

confidence: 99%

Making sense of hormone-mediated defense networking: from rice to Arabidopsis

2014

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“…Genetic studies focusing on mutation in the CHASE-domain of cytoplasmic cytokinin receptors and PUP14 transporter would helpful in addressing this hypothesis. Lastly, plant apoplast is a seat of many other biological functions such as immunity to pathogens [5,6] as well as long-distance communication [2,7], it would be much intriguing to explain these and alike processes under the auspices of this new development in cytokinins biology. …”

Section: Descriptionmentioning

confidence: 99%

Signal or To Sink: The Long-Sought-After Cytokinin Transporter

Shams¹,

Naseem²

2017

Transcriptomics

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“…Cytokinins are phytohormones with significant roles in plant growth and development (Naseem et al, 2014), such as maintenance of chlorophyll (Engelbrecht et al, 1969) and inhibition of leaf senescence (Pritchard & James, 1984b). Leaf miners could make "green islands" around leaf mines in autumn leaves, and leaf-mining larvae manage to complete their life history inside green islands.…”

Section: Impacts On Leaf Chemistrymentioning

confidence: 99%

Revisión de las influencias de los insectos minadores de hojas en sus plantas huésped

Liu

Dai

2015

Collect. Bot

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Influences of leaf-mInIng Insects on theIr host plants: a revIew.-Leaf-mining insects are an herbivore group whose larvae live and feed inside plant leaves. Leaf mines are distinct marks on leaves and can provide much information on insect-plant relationships. Most leaf miners are monophagous or oligophagous. Therefore ecologists and paleontologists use them to study interactions and coevolution among plants, insects and natural enemies. There are many different types of leaf-mining patterns on plant leaves, which may have different impacts on host plants. Compared with ectophagous herbivores, leaf-mining insects should have unique influences on host plant characteristics, such as leaf morphology, leaf chemistry, plant physiology, plant growth and production. Obvious impacts include leaf asymmetry, callus formation, photosynthesis, and green islands. Types and degrees of such influences are varied for different leaf miner species or different host plant species. In turn, the change of plant features may have positive or negative impacts on oviposition and feeding of leaf-mining insects. Studies on plant responses to leaf-mining and the defensive mechanisms of plants are helpful in understanding the coevolution between leaf miners and their food plants.Key words: chemical ecology; interspecific interactions; pest resistance.Resumen revIsIón de las InfluencIas de los Insectos mInadores de hojas en sus plantas huésped.-Los insectos minadores de hojas son un grupo de herbívoros cuyas larvas viven y se alimentan del interior de las hojas. Lo que denominamos minas son las diferentes marcas que quedan en las hojas y que pueden proporcionar valiosa información acerca de las relaciones planta-insecto. La mayoría de minadores son monófagos u oligófagos. Los ecólogos y paleontólogos los usan para estudiar las interacciones y la coevolución entre plantas, insectos y sus enemigos naturales. Existen numerosos tipos de patrones de minas en las hojas, que pueden producir diferentes impactos en la planta hospedadora. Si los comparamos con los insectos ectófagos, los minadores de hojas pueden tener una influencia muy característica en numerosos aspectos de la planta hospedadora, como por ejemplo la morfología y la química foliar, la fisiología de la planta y su crecimiento y producción. Entre los impactos más evidentes, podemos nombrar asimetría foliar, formación de callos, fotosíntesis e «islas verdes». La tipología y el gravedad de estos impactos varían según en tipo de insecto minador y de planta hospedadora. Además, los cambios funcionales que se producen en la planta hospedadora pueden a su vez tener efectos positivos o negativos en la oviposición y la alimentación de los minadores. El estudio de los mecanismos de defensa de la planta hospedadora para combatir a los minadores puede resultar de gran utilidad para entender la coevolución entre ambos organismos Palabras clave: ecología química; interacciones interespecíficas; resistencia a plagas.

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Cytokinins for immunity beyond growth, galls and green islands

Cited by 74 publications

References 15 publications

Making sense of hormone-mediated defense networking: from rice to Arabidopsis

Making sense of hormone-mediated defense networking: from rice to Arabidopsis

Signal or To Sink: The Long-Sought-After Cytokinin Transporter

Revisión de las influencias de los insectos minadores de hojas en sus plantas huésped

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