Temporal Dynamics of Growth and Photosynthesis Suppression in Response to Jasmonate Signaling

Attaran, Elham; Major, Ian T.; Cruz, Jeffrey A.; Rosa, Bruce A.; Koo, Abraham J.; Chen, Jin; Kramer, David; He, Sheng Yang; Howe, Gregg A.

doi:10.1104/pp.114.239004

Cited by 186 publications

(170 citation statements)

References 76 publications

Supporting

Mentioning

155

Contrasting

Order By: Relevance

“…Treatment of Arabidopsis with coronatine, which induces defenses as a molecular mimic of jasmonate-Ile conjugate, reduced photosynthesis-related gene expression within 2 h (Attaran et al, 2014). However, actual photosynthetic output was not reduced until the following day in this experiment.…”

Section: Carbohydrate Metabolismmentioning

confidence: 71%

Alteration of plant primary metabolism in response to insect herbivory

et al. 2015

View full text Add to dashboard Cite

ORCID IDs: 0000-0002-3643-7875 (S.Z.); 0000-0002-4716-4323 (Y.-R.L.); 0000-0002-5912-779X (V.T.); 0000-0002-9675-934X (G.J.).Plants in nature, which are continuously challenged by diverse insect herbivores, produce constitutive and inducible defenses to reduce insect damage and preserve their own fitness. In addition to inducing pathways that are directly responsible for the production of toxic and deterrent compounds, insect herbivory causes numerous changes in plant primary metabolism. Whereas the functions of defensive metabolites such as alkaloids, terpenes, and glucosinolates have been studied extensively, the fitness benefits of changes in photosynthesis, carbon transport, and nitrogen allocation remain less well understood. Adding to the complexity of the observed responses, the feeding habits of different insect herbivores can significantly influence the induced changes in plant primary metabolism. In this review, we summarize experimental data addressing the significance of insect feeding habits, as related to herbivore-induced changes in plant primary metabolism. Where possible, we link these physiological changes with current understanding of their underlying molecular mechanisms. Finally, we discuss the potential fitness benefits that host plants receive from altering their primary metabolism in response to insect herbivory.

show abstract

Section: Carbohydrate Metabolismmentioning

confidence: 71%

Alteration of plant primary metabolism in response to insect herbivory

et al. 2015

View full text Add to dashboard Cite

show abstract

“…After ∼4 wk, the aerial tissues before bolting were harvested and immediately immersed in liquid nitrogen. To assess the effect of environmental stimuli on nucleosome occupancy, plants were treated with coronatine (COR) (Sigma) or water (control), as described previously (Attaran et al 2014). The harvested samples were ground with liquid nitrogen and divided into three aliquots for nucleosome genomic DNA (gDNA), naked gDNA, and RNA isolation.…”

Section: Methodsmentioning

confidence: 99%

Determinants of nucleosome positioning and their influence on plant gene expression

et al. 2015

Self Cite

View full text Add to dashboard Cite

Nucleosome positioning influences the access of transcription factors (TFs) to their binding sites and gene expression. Studies in plant, animal, and fungal models demonstrate similar nucleosome positioning patterns along genes and correlations between occupancy and expression. However, the relationships among nucleosome positioning, cis-regulatory element accessibility, and gene expression in plants remain undefined. Here we showed that plant nucleosome depletion occurs on specific 6-mer motifs and this sequence-specific nucleosome depletion is predictive of expression levels. Nucleosome-depleted regions in Arabidopsis thaliana tend to have higher G/C content, unlike yeast, and are centered on specific G/C-rich 6-mers, suggesting that intrinsic sequence properties, such as G/C content, cannot fully explain plant nucleosome positioning. These 6-mer motif sites showed higher DNase I hypersensitivity and are flanked by strongly phased nucleosomes, consistent with known TF binding sites. Intriguingly, this 6-mer-specific nucleosome depletion pattern occurs not only in promoter but also in genic regions and is significantly correlated with higher gene expression level, a phenomenon also found in rice but not in yeast. Among the 6-mer motifs enriched in genes responsive to treatment with the defense hormone jasmonate, there are no significant changes in nucleosome occupancy, suggesting that these sites are potentially preconditioned to enable rapid response without changing chromatin state significantly. Our study provides a global assessment of the joint contribution of nucleosome occupancy and motif sequences that are likely cis-elements to the control of gene expression in plants. Our findings pave the way for further understanding the impact of chromatin state on plant transcriptional regulatory circuits.

show abstract

“…All chlorophyll fluorescence experiments were performed at the Center for Advanced Algal and Plant Phenotyping at Michigan State University (http:// www.prl.msu.edu/caapp) with previously described setups for the growth chambers (Attaran et al, 2014). Plants were grown under SD for 5 weeks and then subjected to prolonged darkness for 14 d. Chlorophyll fluorescence parameters were measured each day at the end of the subjective night from days 0 to 14 in prolonged darkness.…”

Section: Determination Of the Psii Photochemical Efficiencymentioning

confidence: 99%

The Impact of the Branched-Chain Ketoacid Dehydrogenase Complex on Amino Acid Homeostasis in Arabidopsis

Peng¹,

Uygun²

2015

Plant Physiol.

View full text Add to dashboard Cite

The branched-chain amino acids (BCAAs) Leu, Ile, and Val are among nine essential amino acids that must be obtained from the diet of humans and other animals, and can be nutritionally limiting in plant foods. Despite genetic evidence of its importance in regulating seed amino acid levels, the full BCAA catabolic network is not completely understood in plants, and limited information is available regarding its regulation. In this study, transcript coexpression analyses revealed positive correlations among BCAA catabolism genes in stress, development, diurnal/circadian, and light data sets. A core subset of BCAA catabolism genes, including those encoding putative branched-chain ketoacid dehydrogenase subunits, is highly expressed during the night in plants on a diel cycle and in prolonged darkness. Mutants defective in these subunits accumulate higher levels of BCAAs in mature seeds, providing genetic evidence for their function in BCAA catabolism. In addition, prolonged dark treatment caused the mutants to undergo senescence early and overaccumulate leaf BCAAs. These results extend the previous evidence that BCAAs can be catabolized and serve as respiratory substrates at multiple steps. Moreover, comparison of amino acid profiles between mature seeds and darktreated leaves revealed differences in amino acid accumulation when BCAA catabolism is perturbed. Together, these results demonstrate the consequences of blocking BCAA catabolism during both normal growth conditions and under energy-limited conditions.The branched-chain amino acids (BCAAs) Leu, Ile, and Val are among nine amino acids essential for humans and other animals because they cannot be synthesized de novo (Harper et al., 1984). Plants synthesize BCAAs and are the main source of these essential nutrients in the diets of humans and agriculturally important animals. In addition to their nutritional value, BCAAs and BCAA-derived metabolites such as glucosinolates, fatty acids, and acyl sugars contribute to plant growth, development, defense, and flavor (Mikkelsen and Halkier, 2003;Taylor et al., 2004;Ishizaki et al., 2005;Slocombe et al., 2008;Araújo et al., 2010;Ding et al., 2012;Kochevenko et al., 2012).The BCAA biosynthetic pathway and its regulation have been investigated in Arabidopsis (Arabidopsis thaliana) and other plants for the past two decades, in large part because of the commercial importance of herbicides that inhibit acetohydroxy acid synthase, which is the committing enzyme of BCAA biosynthesis (Singh and Shaner, 1995;Aubert et al., 1997;Singh, 1999;McCourt et al., 2006;Tan et al., 2006;Binder, 2010;Chen et al., 2010;Yu et al., 2010). Strong correlations between the levels of free BCAAs were found in wildtype Arabidopsis seeds and tomato (Solanum lycopersicum) fruits Lu et al., 2008), which suggests coregulation of biosynthesis and/or degradation. This presumably is due, at least in part, to the fact that they share four common biosynthetic enzymes and three catabolic steps. However, despite long-term interest in the desirability of optim...

show abstract

Temporal Dynamics of Growth and Photosynthesis Suppression in Response to Jasmonate Signaling

Cited by 186 publications

References 76 publications

Alteration of plant primary metabolism in response to insect herbivory

Alteration of plant primary metabolism in response to insect herbivory

Determinants of nucleosome positioning and their influence on plant gene expression

The Impact of the Branched-Chain Ketoacid Dehydrogenase Complex on Amino Acid Homeostasis in Arabidopsis

Contact Info

Product

Resources

About