Silicon-mediated changes in polyamine and 1-aminocyclopropane-1-carboxylic acid are involved in silicon-induced drought resistance in Sorghum bicolor L

Yin, Lina; Wang, Shiwen; Liu, Peng; Wang, Wenhua; Cao, Dan; Deng, Xin; Zhang, Suiqi

doi:10.1016/j.plaphy.2014.04.014

Cited by 126 publications

(91 citation statements)

References 37 publications

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“…Similar results were also observed in drought-stressed rice (Chen et al 2011 ). In sorghum plants, Yin et al ( 2014 ) observed Si-mediated enhancement in polyamine synthesis and increase in concentrations of chlorophyll, suggesting the involvement of polyamines in maintaining higher levels of chlorophyll and therefore retarding senescence. In freezing conditions, Zhu et al ( 2006 ) observed that Si addition not only increased the chlorophyll content but also increased the ratio of chlorophyll a/b which indicates the extent of thylakoid stacking (Aro et al 1993 ).…”

Section: Stomatal and Non-stomatal Limitations Of Photosynthesissupporting

confidence: 81%

“…Pei et al ( 2010 ) found that the level of proline was increased in wheat leaves under water stress, while the addition of Si decreased its accumulation, suggesting that proline accumulation was a symptom of stress injury in their experimental conditions. In sorghum plants, Yin et al ( 2014 ) observed that proline levels were signifi cantly decreased while the sugar levels were increased by Si in the roots, and the root osmotic potential was not decreased as a result of Si addition under drought, indicating that the osmotic gradient was not involved in Si-mediated enhancement of water uptake. It can be concluded that the osmotic adjustment may be involved in Si-mediated improvement in water uptake under certain conditions.…”

Section: Root Water Uptakementioning

confidence: 98%

“…Si-mediated enhancement in root growth has also been observed in sorghum under drought . Yin et al ( 2014 ) suggested that the growth enhancement of roots was related to the modulation of root plasticity, which were regulated by Si-mediated increase in polyamine levels and decrease in ethylene levels. The improved root growth can enhance water absorption, which helps to increase plant tolerance to drought stress.…”

Section: Root Water Uptakementioning

confidence: 99%

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Silicon-Mediated Tolerance to Drought and Low-Temperature Stress

Liang

Nikolić

Bélanger

et al. 2015

Silicon in Agriculture

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Drought and low temperature are two of the major adverse climatic factors that restrain plant growth and sustainable agricultural development. Silicon (Si) application can alleviate various abiotic stresses including drought and low temperature, suggesting its potential application in agricultural practices in these adverse soil and climate conditions. The mechanisms for Si-mediated increases of tolerance to drought and low-temperature stresses include physiological, biochemical and physical aspects. These include promoting photosynthetic enzymatic activities, photochemical effi ciency and photosynthetic rate; maintaining nutrient balance; improving water retention by decreasing water loss from leaves and increasing water uptake by roots; and scavenging reactive oxygen species by improving the capabilities of antioxidant defence. Although some progress has been made in the understanding of mechanisms for Si-mediated drought and low-temperature stresses at the physiological, biochemical and physical levels, information on the molecular aspect is still lacking. The use of modern technologies, such as transcriptomics and proteomics approaches, may help clarify the transcriptional and post-transcriptional regulatory mechanisms of Si-mediated tolerance in plants, which will provide a theoretical basis for Si application in agricultural production.

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Section: Stomatal and Non-stomatal Limitations Of Photosynthesissupporting

confidence: 81%

Section: Root Water Uptakementioning

confidence: 98%

Section: Root Water Uptakementioning

confidence: 99%

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Silicon-Mediated Tolerance to Drought and Low-Temperature Stress

Liang

Nikolić

Bélanger

et al. 2015

Silicon in Agriculture

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“…Phytotoxic effects of tetracycline include reduction of the length of wheat roots and stems, and a decrease of their mitotic index (Xie et al, 2011), also lucerne responds identically when exposed to oxytetracycline (Kong et al, 2007). In order to counteract the reduction in water content plants accumulate protective compounds (Yin et al, 2014). ., 2010).…”

Section: Discussionmentioning

confidence: 99%

Role of decarboxylases in the biosynthesis of biogenic amines of pea growing in soil contaminated with lomefloxacin

Baciak¹

2017

Appl Ecol Env Res

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Abstract.Lomefloxacin is an antibiotic used in human and animal medicine that is excreted to the environment, where it is taken up by plants. In the present study, we identified a new, universal parameter of lomefloxacin's toxicity to pea. We showed that activity of arginine decarboxylase and putrescine, which is synthetised in this pathway is a very good toxicity parameter, as confirmed by the calculated EC indices. The lomefloxacin toxicity resulted in a complete inactivation of ornithine decarboxylase and increase of activities of arginine decarboxylase, and S-adenosylmethionine decarboxylase. We propose that putrescine is not synthesised directly from ornithine. Instead, we suggest that the biosynthesis pathway proceeds from arginine to agmatine and is catalysed by arginine decarboxylase, which is followed by the formation of N-carbamoylputrescine with the participation of agmatine imniohydrolase. N-carbamoylputrescine amidohydrolase is involved in the synthesis of putrescine with Ncarbamoylputrescine. The activity of S-adenosylmethionine decarboxylase in the roots and stems increased almost 5-fold, arginine decarboxylase in the roots increased up to 18-fold, while in the stems it increased 6-fold, and ornithine decarboxylase in the roots and stems increased 3.5-fold. The highest biogenic amines content was found in seedlings growing in soil contaminated with 50 mg×kg -1 of soil lomefloxacin. We also recommend quantifying the activity of decarboxylases by measuring the secreted CO 2 volume with a multi-gas analyser equipped with an infrared detector. It is a simple, reliable, and cheap technique. Keywords: morphological parameters of plants, decarboxylases activity, toxicity, infrared detectorAbbreviations: Lomefloxacin -LOM; Effect concentration for the inhibition of growth rate at the level of x % (x = 10,

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“…Frantz et al (2008) evaluated 14 ornamental species and found that the location of silica accumulation is species-specific, but occurs mostly in the leaf trichomes and on the margins of the leaf blade. Higher resistance to water stress observed in silicon-treated sunflower (GUNES et al, 2008), sorghum (YIN et al, 2014) and rice (LAVINSKY et al, 2016) may be due to anatomical changes induced by Si, which consequently lead to lower transpiration and higher photosynthetic rates. These effects render plants that are more efficient in water use.…”

Section: Introductionmentioning

confidence: 99%

Leaf anatomy and gas exchange of ornamental sunflower in response to silicon application

Júnior¹,

Venegas²,

Fontes³

et al. 2017

Biosci. J.

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Silicon applied to substrate for greenhouse cultivation of ornamental pot plants can improve the yield and quality of the ornamental product; however, the possible anatomical and physiological changes caused by Si have to be assessed. Therefore, the objective of this study was to evaluate gas exchange rates and leaf anatomy of ornamental sunflower 'Sunbright' grown on a substrate amended with Si. The experiment was conducted in a greenhouse, and the treatments consisted of sunflower plants cultivated in pots containing 600 g substrate fertilized with Si at rates of 0, 0.25, 0.50, 0.75, and 1.00 g kg -1 . The treatments were arranged in randomized complete block design and four replications. Samples from the middle region of leaf blades in the sixth pair from the apex were collected and analyzed morphometrically. Epidermal trichomes were analyzed using diaphanization and scanning electron microscopy with energy-dispersive X-ray spectroscopy. The following traits were determined: leaf blade thickness, palisade and spongy parenchyma thickness, mesophyll thickness, and abaxial and adaxial epidermis thickness. Net photosynthesis, stomatal conductance and transpiration rates were determined in the fifth leaf at the beginning of the flowering stage by an infrared gas analyzer. The data were subjected to ANOVA and regression analyses. The results indicate that the ornamental sunflower 'Sunbright' accumulates Si in leaf trichomes, and that leaf thickness is not affected by Si application to the substrate; however, transpiration rates decrease while net photosynthesis rate and stomatal conductance increase in response to Si application.

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Silicon-mediated changes in polyamine and 1-aminocyclopropane-1-carboxylic acid are involved in silicon-induced drought resistance in Sorghum bicolor L

Cited by 126 publications

References 37 publications

Silicon-Mediated Tolerance to Drought and Low-Temperature Stress

Silicon-Mediated Tolerance to Drought and Low-Temperature Stress

Role of decarboxylases in the biosynthesis of biogenic amines of pea growing in soil contaminated with lomefloxacin

Leaf anatomy and gas exchange of ornamental sunflower in response to silicon application

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