Abstract
In contrast to animal lectins, no evidence has indicated the occurrence of plant lectins, which recognize and bind "endogenous" receptors and accordingly are involved in recognition mechanisms within the organism itself. Here we show that the plant hormone jasmonic acid methyl ester (JAME) induces in leaves of Nicotiana tabacum (var. Samsun NN) the expression of a lectin that is absent from untreated plants. The lectin specifically binds to oligomers of N-acetylglucosamine and is detected exclusively in the cytoplasm and the nucleus. Both the subcellular location and specificity indicate that the Nicotiana tabacum agglutinin (called Nictaba) may be involved in the regulation of gene expression in stressed plants through specific protein-carbohydrate interactions with regulatory cytoplasmic/nuclear glycoproteins. Searches in the databases revealed that many flowering plants contain sequences encoding putative homologues of the tobacco lectin, which suggest that Nictaba is the prototype of a widespread or possibly ubiquitous family of lectins with a specific endogenous role.
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Claims 4
Claim · model-written summary
Jasmonic acid methyl ester induces a lectin in tobacco leaves that is absent from untreated plants.
- Taxon
- Nicotiana tabacum
Nicotiana tabacume0 - Material
- Samsun NNe0
- Organ / stage
- leavese0
- Treatment
- jasmonic acid methyl ester (JAME)e0
- Outcome
- expression of a lectine0
- Direction
- inducese0
- Comparator
- untreated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the plant hormone jasmonic acid methyl ester (JAME) induces in leaves of Nicotiana tabacum (var. Samsun NN) the expression of a lectin that is absent from untreated plants”
Claim · model-written summary
The tobacco lectin specifically binds N-acetylglucosamine oligomers.
- Taxon
- tobaccoNicotiana tabacume0t0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lectin specifically binds to oligomers of N-acetylglucosamine”
t0“tobacco leaves”
Claim · model-written summary
The tobacco lectin was detected only in the cytoplasm and nucleus.
- Taxon
- tobaccoNicotiana tabacume0t0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“is detected exclusively in the cytoplasm and the nucleus”
t0“tobacco leaves”
Claim · model-written summary
Database searches found putative tobacco lectin homologues across many flowering plants.
- Taxon
- flowering plantsMagnoliopsidae0
- Gene
- tobacco lectine0
- Outcome
- sequences encoding putative homologues of the tobacco lectine0
Verbatim
e0“many flowering plants contain sequences encoding putative homologues of the tobacco lectin”
The same questions in other papers
jasmonic acid · molecular: expression · Nicotiana tabacum (tobacco)Positive and negative results
5 papers in the same direction as this paper · 4 in the opposite direction
- no effect
- no effect
- negative
6 papers more in this group
See all 10 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.