Salt Stress Induces Increase in Starch Accumulation in Duckweed (Lemna aequinoctialis, Lemnaceae): Biochemical and Physiological Aspects

Morais, Marciana Bizerra de; Neto, Adauto Gomes Barbosa; Willadino, Lília; Ulisses, Cláudia; Calsa, Tercílio

doi:10.1007/s00344-018-9882-z

Cited by 30 publications

(20 citation statements)

References 61 publications

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“…and starch, which are the important sources of energy in the process of plant growth and metabolism. The WSC content (49 g/kg) in CK was significantly higher than in other groups, because salt stress inhibits the metabolism and accumulation of carbohydrates in plants (Morais et al, 2019 ). Salt stress is a likely factor to cause chemical composition changes.…”

Section: Discussionmentioning

confidence: 99%

The Potential Effects on Microbiota and Silage Fermentation of Alfalfa Under Salt Stress

Lü

Wang

et al. 2021

Front. Microbiol.

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This study investigated the fermentation quality of alfalfa grown in different salt stress regions in China. Following the production of silage from the natural fermentation of alfalfa, the interplay between the chemical composition, fermentation characteristics, and microbiome was examined to understand the influence of these factors on the fermentation quality of silage. The alfalfa was cultivated under salt stress with the following: (a) soil content of <1%0 (CK); (b) 1–2%0 (LS); (c) 2–3%0 (MS); (d) 3–4%0 (HS). The pH of the silage was high (4.9–5.3), and lactic acid content was high (26.3–51.0 g/kg DM). As the salt stress increases, the NA+ of the silages was higher (2.2–5.4 g/kg DM). The bacterial alpha diversities of the alfalfa silages were distinct. There was a predominance of desirable genera including Lactococcus and Lactobacillus in silage produced from alfalfa under salt stress, and this led to better fermentation quality. The chemical composition and fermentation characteristics of the silage were closely correlated with the composition of the bacterial community. Furthermore, NA+ was found to significantly influence the microbiome of the silage. The results confirmed that salt stress has a great impact on the quality and bacterial community of fresh alfalfa and silage. The salt stress and plant ions were thus most responsible for their different fermentation modes in alfalfa silage. The results of the study indicate that exogenous epiphytic microbiota of alfalfa under salt stress could be used as a potential bioresource to improve the fermentation quality.

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Section: Discussionmentioning

confidence: 99%

The Potential Effects on Microbiota and Silage Fermentation of Alfalfa Under Salt Stress

Lü

Wang

et al. 2021

Front. Microbiol.

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“…For example, the starch contents of 9 clones of Le. aequinoctialis growing under identical conditions varied between 2.5 and 22.5% of the tissue fresh weight (Barbosa Neto et al 2019). The investigation of 16 strains of 6 duckweed species under optimal growth conditions revealed that two strains of Lemna gibba exhibited almost 40% of the frond DW as starch (Sree et al 2015a), and the mutant sub-1 derived from the Le.…”

Section: Frond Starch Accumulation Due To Growthmentioning

confidence: 99%

“…Apart from hindering the growth of the plants, salinity stress has induced accumulation of starch in duckweeds in a dose and time dependent manner. The exposure of duckweeds to saline conditions induced oxidative stress (Panda and Upadhya 2003;Cheng 2011;Cheng et al 2013;Sikorski et al 2013) and activated the antioxidant pathway to protect the plants from oxidative damage (Radic and Pevalek-Kozlina 2010;Chang et al 2012;de Morais et al 2019). The salinity treatment of W. arrhiza plants showed also an inhibition of photosynthesis with impaired electron transport and inactivation of PSII reaction centre (Wang et al 2011).…”

Section: Salt Stress On Starch Accumulationmentioning

confidence: 99%

Accumulation of starch in duckweeds (Lemnaceae), potential energy plants

Appenroth¹,

Ziegler

Sree

2021

Physiol Mol Biol Plants

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Starch can accumulate in both actively growing vegetative fronds and over-wintering propagules, or turions of duckweeds, small floating aquatic plants belonging to the family of the Lemnaceae. The starch synthesizing potential of 36 duckweed species varies enormously, and the starch contents actually occurring in the duckweed tissues are determined by growth conditions, various types of stress and the action of growth regulators. The present review examines the effects of phytohormones and growth retardants, heavy metals, nutrient deficiency and salinity on the accumulation of starch in duckweeds with a view to obtaining high yields of starch as a feedstock for biofuel production. Biotechnological approaches to degrading duckweed starch to its component sugars and the fermentation of these sugars to bio-alcohols are also discussed.

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“…It is assumed that plastoglobules are related to salt tolerance or may be related to degradation or aging processes during stress. Starch accumulation may be also affected by salinity stress (de Morais et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Salt Stress Affects Plastid Ultrastructure and Photosynthetic Activity but Not the Essential Oil Composition in Spearmint (Mentha spicata L. var. crispa “Moroccan”)

et al. 2021

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High levels of soil salinity affect plant growth, reproduction, water and ion uptake, and plant metabolism in a complex manner. In this work, the effect of salt stress on vegetative growth, photosynthetic activity, and chloroplast ultrastructure of spearmint (Mentha spicata L. var. crispa “Moroccan”) was investigated. After 2 weeks of low concentration treatments (5, 25, and 50 mM NaCl) of freshly cut shoots, we observed that the stem-derived adventitious root formation, which is a major mean for vegetative reproduction among mints, was completely inhibited at 50 mM NaCl concentration. One-week-long, high concentration (150 mM NaCl) salt stress, and isosmotic polyethylene glycol (PEG) 6000 treatments were compared in intact (rooted) plants and freshly cut, i.e., rootless shoots. Our data showed that roots have an important role in mitigating the deleterious effects of both the osmotic (PEG treatment) and specific ionic components of high salinity stress. At 50 mM NaCl or above, the ionic component of salt stress caused strong and irreversible physiological alterations. The effects include a decrease in relative water content, the maximal and actual quantum efficiency of photosystem II, relative chlorophyll content, as well as disorganization of the native chlorophyll-protein complexes as revealed by 77 K fluorescence spectroscopy. In addition, important ultrastructural damage was observed by transmission electron microscopy such as the swelling of the thylakoid lumen at 50 mM NaCl treatment. Interestingly, in almost fully dry leaf regions and leaves, granum structure was relatively well retained, however, their disorganization occurred in leaf chloroplasts of rooted spearmint treated with 150 mM NaCl. This loss of granum regularity was also confirmed in the leaves of these plants using small-angle neutron scattering measurements of intact leaves of 150 mM NaCl-stressed rooted plants. At the same time, solid-phase microextraction of spearmint leaves followed by gas chromatography and mass spectrometry (GC/MS) analyses revealed that the essential oil composition of spearmint was unaffected by the treatments applied in this work. Taken together, the used spearmint cultivar tolerates low salinity levels. However, at 50 mM NaCl concentration and above, the ionic components of the stress strongly inhibit adventitious root formation and thus their clonal propagation, and severely damage the photosynthetic apparatus.

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Salt Stress Induces Increase in Starch Accumulation in Duckweed (Lemna aequinoctialis, Lemnaceae): Biochemical and Physiological Aspects

Cited by 30 publications

References 61 publications

The Potential Effects on Microbiota and Silage Fermentation of Alfalfa Under Salt Stress

The Potential Effects on Microbiota and Silage Fermentation of Alfalfa Under Salt Stress

Accumulation of starch in duckweeds (Lemnaceae), potential energy plants

Salt Stress Affects Plastid Ultrastructure and Photosynthetic Activity but Not the Essential Oil Composition in Spearmint (Mentha spicata L. var. crispa “Moroccan”)

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