Relative contribution of LOX10, green leaf volatiles and JA to wound-induced local and systemic oxylipin and hormone signature in Zea mays (maize)

He, Yuan; Borrego, Eli J.; Gorman, Zachary; Huang, Pei‐Cheng; Kolomiets, Michael V.

doi:10.1016/j.phytochem.2020.112334

Cited by 42 publications

(53 citation statements)

References 72 publications

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“…Tea plant CsLOX1 was induced in response to feeding by the tea green leafhopper, and the expression profile showed a clear association with the emission pattern of LOX-derived volatiles [50]. ZmLOX10 provides substrate to several LOX branches and produces a series of 13-oxylipin products, and the zmlox10 plants were unable to produce green leaf volatiles (GLVs) and JA, resulting in a dramatic decline in herbivore-induced plant volatiles and attractiveness to parasitoid wasps [51,52]. A recent study has revealed that GLVs and JA contribute to maize susceptibility to Colletotrichum graminicola due to the suppression of SA-related defense [53].…”

Section: Discussionmentioning

confidence: 99%

Comprehensive Genomic Characterization and Expression Analysis of the Lipoxygenase Gene Family in Watermelon under Hormonal Treatments

Liu

Zhou

et al. 2020

Agriculture

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Lipoxygenases (LOXs) are non-haem iron-containing dioxygenases and play vital roles in a variety of plant biological processes. Here, we first carried out the genome-wide identification of LOX genes in watermelon. A total of 16 LOX genes were identified, which could be classified into two categories according to phylogenetic analysis: the 9-LOXs (ClLOX1–4, 12, and 15) and 13-LOXs (ClLOX5–11, 13, 14, and 16). Furthermore, the protein structures, intrachromosomal distributions, and gene structures were thoroughly analyzed. Cis-element analysis of the promoter regions indicated that the expression of ClLOX genes may be influenced by stress and plant hormones. Bioinformatic and expression analyses revealed that the expression of ClLOX genes is tissue-specific and hormone-responsive. The detected LOX genes exhibited distinctive expression patterns in various tissues. Different ClLOX genes showed different responses to methyl jasmonate (MeJA), salicylic acid (SA), and ethylene (ET) treatments, particularly ClLOX7, which exhibited the most active response to the above treatments. This study provides valuable information for a better understanding of the functions of LOX genes and further exploration of the LOX gene family in watermelon.

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Section: Discussionmentioning

confidence: 99%

Comprehensive Genomic Characterization and Expression Analysis of the Lipoxygenase Gene Family in Watermelon under Hormonal Treatments

Liu

Zhou

et al. 2020

Agriculture

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“…Specifically, we expected to find: (i) a shift from reliance on induced to constitutive herbivore defence with domestication and cultivation in increasingly rich environments; (ii) a decline in levels of putative insecticidal metabolites of the LOX pathway, and; (iii) an increase in the growth-promoting phytohormone, IAA [37,38,40,54]. We discussed our results in the contexts of those expectations, as well as in reference to prior results concerning the evolution of maize 19,20,22,60]. The phenylpropanoid pathway (PAL), which includes COU, BNZ, and SA, is broadly relevant to pathogen defence [6,10].…”

Section: Introductionmentioning

confidence: 77%

Maize Biochemical Defences against a Rootworm Were Mediated by Domestication, Spread, and Breeding

Fontes-Puebla

Borrego

Kolomiets

2020

Preprint

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258 words) Plant physiological processes generally are regulated by phytohormones, including plant biochemical responses to herbivory. Here, we addressed whether a suite of maize (Zea mays mays) phytohormones, including some precursor and derivative metabolites, relevant to herbivory defence were mediated by the crop's domestication, northward spread, and modern breeding. For this, we compared phytohormone and metabolite levels among four plant types representing the evolutionary and agronomic transitions from maize's wild ancestor, Balsas teosinte (Zea mays parviglumis), to Mexican and US maize landraces, and to highly-bred US maize cultivars, as affected by root herbivory by Western corn rootworm (Diabrotica virgifera virgifera). Following ecological-evolutionary hypotheses, we expected to find changes in: (i) maize defence strategy, from reliance on induced to constitutive defences; (ii) levels of phytohormones relevant to herbivore resistance consistent with gradual weakening of defences, and; (iii) levels of a phytohormone relevant to herbivory tolerance because it positively affects plant growth. We found that with its domestication, maize seemed to have transitioned from reliance on induced defences in Balsas teosinte to reliance on constitutive defences in maize. Also, we found that while one subset of phytohormones relevant to herbivory was suppressed (13-oxylipins), another was enhanced (9-oxylipins) with domestication, and both subsets were variably affected by spread and breeding. Finally, an auxin phytohormone directly linked to growth (indole-3acetic acid), increased significantly with domestication, and seemingly with spread and breeding. We concluded that rootworm defences in maize were mediated by domestication and ensuing processes, such as spread and breeding, and argued that agricultural intensification mediated maize defence evolution in parallel with modern breeding.

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“…In maize, two 12-Oxo-Phytodienoic acid Reductase (OPR7 and OPR8) genes are involved in the conversion of OPDA to JA [10]. Basal and wound-induced OPDA levels in opr7 opr8 double mutants were reduced as compared to wild-type B73 plants, whereas JA induction was undetectable in opr7opr8 plants [11]. Previously, we showed that there were comparable CLA numbers on B73 and opr7opr8 plants, however, exogenous application of OPDA showed significantly lesser aphid numbers on opr7opr8 plants [6].…”

Section: Exogenous Application Of Opda Does Not Affect the Feeding Of Cla On Maize Plantsmentioning

confidence: 99%

Maize defense elicitor, 12-oxo-phytodienoic acid, prolongs aphid salivation

Grover

Varsani

Kolomiets

et al. 2020

Communicative & Integrative Biology

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12-Oxo-phytodienoic acid (OPDA), an intermediate in the jasmonic acid (JA) biosynthesis pathway, regulates diverse signaling functions in plants, including enhanced resistance to insect pests. We previously demonstrated that OPDA promoted enhanced callose accumulation and heightened resistance to corn leaf aphid (CLA; Rhopalosiphum maidis), a phloem sap-sucking insect pest of maize (Zea mays). In this study, we used the electrical penetration graph (EPG) technique to monitor and quantify the different CLA feeding patterns on the maize JA-deficient 12-oxophytodienoic acid reductase (opr7opr8) plants. CLA feeding behavior was unaffected on B73, opr7opr8 control plants (-OPDA), and opr7opr8 plants that were pretreated with OPDA (+ OPDA). However, exogenous application of OPDA on opr7opr8 plants prolonged aphid salivation, a hallmark of aphids' ability to suppress the plant defense responses. Collectively, our results indicate that CLA utilizes its salivary secretions to suppress or unplug the OPDA-mediated sieve element occlusions in maize.

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Relative contribution of LOX10, green leaf volatiles and JA to wound-induced local and systemic oxylipin and hormone signature in Zea mays (maize)

Cited by 42 publications

References 72 publications

Comprehensive Genomic Characterization and Expression Analysis of the Lipoxygenase Gene Family in Watermelon under Hormonal Treatments

Comprehensive Genomic Characterization and Expression Analysis of the Lipoxygenase Gene Family in Watermelon under Hormonal Treatments

Maize Biochemical Defences against a Rootworm Were Mediated by Domestication, Spread, and Breeding

Maize defense elicitor, 12-oxo-phytodienoic acid, prolongs aphid salivation

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