Temperature-induced lipocalin-mediated membrane integrity: Possible implications for vindoline accumulation in Catharanthus roseus leaves.

Autor: Mall M; CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, Uttar Pradesh, India., Shanker K; CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, Uttar Pradesh, India., Nagegowda DA; CSIR-Central Institute of Medicinal and Aromatic Plants, Research Centre, Bengaluru, Karnataka, India., Samad A; CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, Uttar Pradesh, India., Kalra A; CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, Uttar Pradesh, India., Pandey A; CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, Uttar Pradesh, India., Sundaresan V; CSIR-Central Institute of Medicinal and Aromatic Plants, Research Centre, Bengaluru, Karnataka, India., Shukla AK; CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, Uttar Pradesh, India.
Jazyk: angličtina
Zdroj: Physiologia plantarum [Physiol Plant] 2023 Sep-Oct; Vol. 175 (5), pp. e13994.
DOI: 10.1111/ppl.13994
Abstrakt: Plant lipocalins perform diverse functions. Recently, allene oxide cyclase, a lipocalin family member, has been shown to co-express with vindoline pathway genes in Catharanthus roseus under various biotic/abiotic stresses. This brought focus to another family member, a temperature-induced lipocalin (CrTIL), which was selected for full-length cloning, tissue-specific expression profiling, in silico characterization, and upstream genomic region analysis for cis-regulatory elements. Stress-mediated variations in CrTIL expression were reflected as disturbances in cell membrane integrity, assayed through measurement of electrolyte leakage and lipid peroxidation product, MDA, which implicated the role of CrTIL in maintaining cell membrane integrity. For ascertaining the function of CrTIL in maintaining membrane stability and elucidating the relationship between CrTIL expression and vindoline content, if any, a direct approach was adopted, whereby CrTIL was transiently silenced and overexpressed in C. roseus. CrTIL silencing and overexpression confirmed its role in the maintenance of membrane integrity and indicated an inverse relationship of its expression with vindoline content. GFP fusion-based subcellular localization indicated membrane localization of CrTIL, which was in agreement with its role in maintaining membrane integrity. Altogether, the role of CrTIL in maintaining membrane structure has possible implications for the intracellular sequestration, storage, and viability of vindoline.
(© 2023 Scandinavian Plant Physiology Society.)
Databáze: MEDLINE
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