ArticlePlant physiology2001
Class I beta-1,3-glucanase and chitinase are expressed in the micropylar endosperm of tomato seeds prior to radicle emergence.
Article in Plant physiology, 2001. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers.
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Who cites it
29 citing papers in PubMed, 143 citations in OpenAlex.
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- Evaluation of microalgae polysaccharides as biostimulants of tomato plant defense using metabolomics and biochemical approaches.Scientific reports · 2021Article
- Expression analysis of chitinase upon challenge inoculation toBiotechnology reports (Amsterdam, Netherlands) · 2017Article
- α-Xylosidase plays essential roles in xyloglucan remodelling, maintenance of cell wall integrity, and seed germination in Arabidopsis thaliana.Journal of experimental botany · 2016Article
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- Analogous reserve distribution and tissue characteristics in quinoa and grass seeds suggest convergent evolution.Frontiers in plant science · 2014Review
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- Distinct cell wall architectures in seed endosperms in representatives of the Brassicaceae and Solanaceae.Plant physiology · 2012Article
- A comparative analysis of proteins that accumulate during the initial stage of root hair development in barley root hair mutants and their parent varieties.Journal of applied genetics · 2012Article
- High-capacity calcium-binding chitinase III from pomegranate seeds (Punica granatum Linn.) is located in amyloplasts.Plant signaling & behavior · 2011Review
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- A genetic locus and gene expression patterns associated with the priming effect on lettuce seed germination at elevated temperatures.Plant molecular biology · 2010Article
- Genome-wide analysis of genes targeted by qLTG3-1 controlling low-temperature germinability in rice.Plant molecular biology · 2010Article
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Authors and funding
4 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
beta-1,3-Glucanase (EC 3.2.1.39) and chitinase (EC 3.2.1.14) mRNAs, proteins, and enzyme activities were expressed specifically in the micropylar tissues of imbibed tomato (Lycopersicon esculentum Mill.) seeds prior to radicle emergence. RNA hybridization and immunoblotting demonstrated that both enzymes were class I basic isoforms. beta-1,3-Glucanase was expressed exclusively in the endosperm cap tissue, whereas chitinase localized to both endosperm cap and radicle tip tissues. beta-1,3-Glucanase and chitinase appeared in the micropylar tissues of gibberellin-deficient gib-1 tomato seeds only when supplied with gibberellin. Accumulation of beta-1,3-glucanase mRNA, protein and enzyme activity was reduced by 100 microM abscisic acid, which delayed or prevented radicle emergence but not endosperm cap weakening. In contrast, expression of chitinase mRNA, protein, and enzyme activity was not affected by abscisic acid. Neither of these enzymes significantly hydrolyzed isolated tomato endosperm cap cell walls. Although both beta-1,3-glucanase and chitinase were expressed in tomato endosperm cap tissue prior to radicle emergence, we found no evidence that they were directly involved in cell wall modification or tissue weakening. Possible functions of these hydrolases during tomato seed germination are discussed.
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