O3-Induced Priming Defense Associated With the Abscisic Acid Signaling Pathway Enhances Plant Resistance to Bemisia tabaci

Abstract

Elevated ozone (O 3) modulates phytohormone signals, which subsequently alters the interaction between plants and herbivorous insects. It has been reported that elevated O 3 activates the plant abscisic acid (ABA) signaling pathway, but its cascading effect on the performance of herbivorous insects remains unclear. Here, we used the ABA-deficient tomato mutant notabilis (not) and its wild type, Ailsa Craig (AC), to determine the role of ABA signaling in mediating the effects of elevated O 3 on Bemisia tabaci in field open-top chambers (OTCs). Our results showed that the population abundance and the total phloem-feeding duration of B. tabaci were decreased by O 3 exposure in AC plants compared with not plants. Moreover, elevated O 3 and B. tabaci infestation activated the ABA signaling pathway and enhanced callose deposition in AC plants but had little effect on those in not plants. The exogenous application of a callose synthesis inhibitor (2-DDG) neutralized O 3-induced resistance to B. tabaci, and the application of ABA enhanced callose deposition and exacerbated the negative effects of elevated O 3 on B. tabaci. However, the application of 2-DDG counteracted the negative effects of O 3 exposure on B. tabaci in ABA-treated AC plants. Collectively, this study revealed that callose deposition, which relied on the ABA signaling pathway, was an effective O 3-induced priming defense of tomato plants against B. tabaci infestation.

Multi‐omics analysis to visualize the dynamic roles of defense genes in the response of tea plants to gray blight

“…This may be due to the signal transduction of plant hormones, rather than plant hormone biosynthesis, in response to GB. Furthermore, recent studies have revealed that ABA has an important role in resistance to plant disease (Cao et al ., 2019; Guo et al ., 2020). Mang et al .…”

Transcriptome analysis identified core genes involved in maize resistance to Rhizoctonia solani

“…ABA is well known for its involvement in response to abiotic stress, and its functions in defense response have been also illustrated (García-Andrade et al 2020;Guo et al 2020b). In this study, 16 ABA-related genes were identi ed among the core genes (Fig.…”

Mitigating tradeoffs in plant breeding

“…Grain number per panicle1 ( GNP1 ), which encodes gibberellin biosynthesis gene GA20ox1 , affects seed per panicle in rice ( Wu et al., 2016 ). To unfold GNP1 effect on sink, source, and flow in regulating grain yield in rice, Zhai et al. (2020) compared ‘Lemont’, a japonica cultivar, with its near isogenic line (NIL-GNP1 TQ ) in ‘Lemont’ background, containing an allele at GNP1 locus from a high-yielding indica cultivar ‘Teqing’.…”

“…Significantly lower carbohydrate accumulation in culms and leaf sheath before heading in comparison to ‘Lemont’ contributed to low seed setting rate and grain weight of IS in NIL-GNP1 TQ . However, significantly increased grain number panicle −1 from introgression of GNP1 TQ into ‘Lemont’ did not result in significant improvement in grain yield of NIL-GNP1 TO primarily due to significant low sink activities in IS and insufficient source supply, not sufficient to meet the increased sink capacity demand ( Zhai et al., 2020 ).…”

“…(2019b) IPA1 Defends rice plants against fungal infection when needed but reallocates resources within days back to growth, sustaining both pathogen defense and crop yields Wang et al. (2018) Source versus sink GNP1 Regulates seeds per panicle and balances sink‒source‒flow to minimize negative tradeoffs in rice Zhai et al. (2020) C:N partitioning QQS Transgenic soybean containing QQS enhanced seed protein by 18% and reduced oil by 13% with no adverse impact on plant growth, seed yield, seed morphology or seed weight Li and Wurtele (2015) QQS Enhanced protein in transgenic maize, rice, and soybean containing QQS independent of genetic background and original protein content Li et al.…”