Sucrose phosphate synthase (SPS), sucrose synthase (SUS) and their products in the leaves of Miscanthus × giganteus and Zea mays at low temperature.

Planta
Anna Bilska-KosJacek Zebrowski

Abstract

The changes in the expression of key sugar metabolism enzymes (SPS and SUS), sucrose content and arrangement of chloroplast starch may play a significant role in the cold response in M. giganteus and maize plants. To understand the mechanism of the chilling-response of two closely-related C4 plants, we investigated the changes in the expression of sucrose phosphate synthase (SPS) and sucrose synthase (SUS) as well as changes in their potential products: sucrose, cellulose and starch in the leaves of Miscanthus × giganteus and Zea mays. Low temperature (12-14 °C) increased SPS content in Miscanthus (MG) and chilling-sensitive maize line (Zm-S), but not in chilling-tolerant one (Zm-T). In Zm-S line, chilling also caused the higher intensity of labelling of SPS in the cytoplasm of mesophyll cells, as demonstrated by electron microscopy. SUS labelling was also increased by cold stress only in MG plants what was observed in the secondary wall between mesophyll and bundle sheath cells, as well as in the vacuoles of companion cells. Cold led to a marked increase in total starch grain area in the chloroplasts of Zm-S line. In turn, Fourier transform infrared spectroscopy (FTIR) showed a slight shift in the cellulose band position, whic...Continue Reading

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Citations

Aug 17, 2020·International Journal of Molecular Sciences·Piotr T BednarekRenata Orłowska
Jul 25, 2021·International Journal of Molecular Sciences·Weitao LiHuifang Jiang
Sep 7, 2021·Frontiers in Plant Science·Jhon Henry Trujillo-MontenegroJohn J Riascos

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Methods Mentioned

BETA
infrared spectroscopy
electrophoresis

Software Mentioned

PeakSimple
R Core Team
hyperSpecc
OMNIC
iTEM
ChemoSpec
R

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