Salt-tolerance mechanisms induced in Stevia rebaudiana Bertoni: Effects on mineral nutrition, antioxidative metabolism and steviol glycoside content

Plant Physiology and Biochemistry : PPB
Daniel CantabellaPedro Diaz-Vivancos

Abstract

In order to cope with challenges linked to climate change such as salinity, plants must develop a wide spectrum of physiological and molecular mechanisms to rapidly adapt. Stevia rebaudiana Bertoni plants are a case in point. According to our findings, salt stress has no significant effect on plant growth in these plants, which accumulate sodium (Na+) in their roots, thus avoiding excessive Na+ accumulation in leaves. Furthermore, salt stress (NaCl stress) increases the potassium (K+), calcium (Ca2+), chloride ion (Cl-) and proline concentrations in Stevia leaves, which could contribute to osmotic adjustment. We also found that long-term NaCl stress does not produce changes in chlorophyll concentrations in Stevia leaves, reflecting a mechanism to protect the photosynthesis process. Interestingly, an increase in chlorophyll b (Chlb) content occured in the oldest plants studied. In addition, we found that NaCl induced reactive oxygen species (ROS) accumulation in Stevia leaves and that this accumulation was more evident in the presence of 5 g/L NaCl, the highest concentration used in the study. Nevertheless, Stevia plants are able to induce (16 d) or maintain (25 d) antioxidant enzymes to cope with NaCl-induced oxidative stress. ...Continue Reading

Citations

Dec 28, 2019·International Journal of Molecular Sciences·Muhammad KamranJen-Tsung Chen
Feb 23, 2020·Plant Signaling & Behavior·Yu LiuJianmei Wang
May 30, 2020·Applied Microbiology and Biotechnology·Marta Libik-KoniecznyLaura Pistelli
May 8, 2020·Physiology and Molecular Biology of Plants : an International Journal of Functional Plant Biology·Mahyar GeramiZeinab Alipour
Nov 11, 2018·International Journal of Molecular Sciences·Agustina Bernal-VicentePedro Diaz-Vivancos
Jan 17, 2020·Antioxidants·Grisaly GarcíaJosé Antonio Hernández
May 30, 2019·International Journal of Molecular Sciences·Yan LiuZhiqiang Lv
Dec 12, 2020·Plant Physiology and Biochemistry : PPB·Beatriz LorenteMaría Jesús Sánchez-Blanco
Apr 30, 2021·Applied Microbiology and Biotechnology·Marta Libik-KoniecznyRobert Konieczny
Aug 6, 2021·Plant Cell Reports·Smita Chaudhry, Gagan Preet Singh Sidhu

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