ArticlePhysiologia plantarum
Rol-Transformed Kalanchoë Shows Altered Root Allocation and Photosynthetic Responses to Nitrogen Deficiency.
Article in Physiologia plantarum. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- Rol-Transformed Kalanchoë Shows Altered Root Allocation and Photosynthetic Responses to Nitrogen Deficiency.Physiologia plantarumArticle
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10 authors.
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Abstract
Ri/rol transformation by Rhizobium rhizogenes is well known to alter plant architecture, including shoot compactness, branching and root development. However, its significance for plant responses to nitrogen limitation remains unclear. Here, we investigated developmental, physiological and hormonal responses of an interspecific Kalanchoë laciniata × K. blossfeldiana hybrid to nitrogen deficiency using complementary pot and hydroponic experiments. Nitrogen deficiency strongly reduced leaf area and total biomass in both wild-type (WT) and rol-transformed (Rol) plants. Nevertheless, rol transformation consistently produced a more compact, highly branched phenotype, with increased leaf number, greater side-shoot formation, higher specific leaf area, lower leaf dry matter content, and, in hydroponics, a striking increase in root mass allocation. Rol plants also maintained higher chlorophyll and carotenoid concentrations than WT and showed altered carbon partitioning, with lower soluble sugars but a higher relative proportion of sucrose. Under nitrogen deficiency, Rol plants maintained positive net photosynthesis and higher electron transport, whereas WT plants showed near-complete suppression of CO
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