Publication: Effects of soil amendments on leaf anatomical characteristics of marigolds cultivated in cadmium-spiked soils
Issued Date
2021-12-01
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ISSN
20452322
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2-s2.0-85112006137
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Mahidol University
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SCOPUS
Bibliographic Citation
Scientific Reports. Vol.11, No.1 (2021)
Suggested Citation
Alapha Thongchai, Weeradej Meeinkuirt, Puntaree Taeprayoon, Isma ae Chelong Effects of soil amendments on leaf anatomical characteristics of marigolds cultivated in cadmium-spiked soils. Scientific Reports. Vol.11, No.1 (2021). doi:10.1038/s41598-021-95467-9 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/79222
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Title
Effects of soil amendments on leaf anatomical characteristics of marigolds cultivated in cadmium-spiked soils
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Abstract
The marigolds (Tagetes spp.) in this study were classified as excluders for cadmium (Cd); however, their leaves also accumulated substantial Cd content. Among the experimental treatments (i.e., control, cattle manure, pig manure, and leonardite which served as soil amendments), pig manure resulted in significantly increased growth performance for all marigold cultivars as seen by relative growth rates (119–132.3%) and showed positive effects on leaf anatomy modifications, e.g., thickness of spongy and palisade mesophyll, size of vein area and diameter of xylem cells. This may be due to substantially higher essential nutrient content, e.g., total nitrogen (N) and extractable phosphorus (P), in pig manure that aided all marigold cultivars, particularly the French cultivar which exhibited the highest relative growth rate (132.3%). In the Cd-only treatment, cell disorganization was observed in vascular bundles as well as in palisade and spongy mesophyll, which may have been responsible for the lowest plant growth performance recorded in this study, particularly among the American and Honey cultivars (RGR = 73% and 77.3%, respectively).