Foliar or Subirrigation Silicon Supply Mitigates High Temperature Stress in Strawberry by Maintaining Photosynthetic and Stress-Responsive Proteins

Muneer, Sowbiya; Park, Yoo Gyeong; Kim, Soohoon; Jeong, Byoung Ryong

doi:10.1007/s00344-017-9687-5

Cited by 61 publications

(29 citation statements)

References 39 publications

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“…Notably, enzymatic antioxidants play a pivotal role in mitigating oxidative stress induced by environmental stressors. Exogenous Si application can alleviate oxidative stress in a number of plant species, including tomatoes [44], cucumber [20], strawberry [17], rapeseed [15], and rice [16]. In agreement with this, we found that exogenous Si application remarkably alleviated LP-induced oxidative stress as evidenced by attenuated ROS accumulation and MDA content (Figures 1 and 2).…”

Section: Discussionsupporting

confidence: 83%

“…However, exogenous Si application significantly increased photosynthetic pigment contents as well as net photosynthetic rate under LP stress compared with that under LP stress alone. Consistent with this, exogenous Si (K 2 SiO 3 ) either applied on leaves or roots increases the expression levels of photosynthetic proteins, such as the PsaA (a core protein of photosystem I) and the PsbA (D1 protein of photosystem II) in strawberry, under high temperatures, which largely contribute to maintain photosynthesis under stressful conditions [17].…”

Section: Discussionmentioning

confidence: 64%

“…In wheat, exogenous Si application confers tolerance to UV stress by regulating the activities of antioxidant enzymes, such as superoxide dismutase (SOD), ascorbate peroxidase (APX), and catalase (CAT) [45]. Similarly, exogenous Si application (foliar or root treatment) increases the abundance of antioxidant proteins (SOD, CAT, and APX) which potentially alleviates oxidative stress and improves thermotolerance in strawberry plants [17]. All these results suggest that Si has the potential to stimulate antioxidant potential that can function to quench ROS in tomato plants.…”

Section: Discussionmentioning

confidence: 99%

“…Si fertilization as a means for nutrient management has shown to increase rice productivity in Japan [13]. Si also improves plant tolerance to a wide range of biotic and abiotic stresses, such as drought, salinity, heat, cold, metal toxicity, and nutrient stress [11,[14][15][16][17]. Under heavy metal stress, Si enhances precipitation of toxic ion, reduces its transport to above ground plant parts, and promotes in planta sequestration; however, the phenomena are closely associated with Si-induced enhanced ROS scavenging in plants [14,18].…”

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confidence: 99%

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Silicon Compensates Phosphorus Deficit-Induced Growth Inhibition by Improving Photosynthetic Capacity, Antioxidant Potential, and Nutrient Homeostasis in Tomato

et al. 2019

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Phosphorus (P) deficiency in soils is a major problem for sustainable crop production worldwide. Silicon (Si) is a beneficial element that can promote plant growth, development and responses to stresses. However, the effect of Si on tomato (Solanum lycopersicum L.) growth, photosynthesis and mineral uptake under P deficit conditions and underlying mechanisms remain unclear. Here, we showed that low P (LP) supply inhibited tomato growth as revealed by significantly decreased fresh and dry weights of shoots and impaired root morphological traits. LP-induced growth inhibition was associated with decreased photosynthetic pigment content, net photosynthetic rate (Pn), stomatal conductance, transpiration rate and water use efficiency. However, exogenous Si application alleviated LP-induced decreases in growth and physiological parameters. In particular, Si increased Pn by 65.2%, leading to a significantly increased biomass accumulation. Biochemical quantification and in situ visualization of reactive oxygen species (ROS) showed increased ROS (O2−· and H2O2) accumulation under LP stress, which eventually elevated lipid peroxidation. Interestingly, exogenous Si decreased ROS and malondialdehyde levels by substantially increasing the activity of antioxidant enzymes, including superoxide dismutase, peroxidase, and catalase. In addition, Si increased concentrations of osmoregulatory substances, such as proline, soluble sugar, soluble proteins, free amino acids, and organic acids under LP stress. Analysis of major element concentrations revealed that exogenous Si application under LP stress not only increased Si uptake but also enhanced the concentrations of most essential elements (K, Na, Ca, Mg, Fe, and Mn) in different tissues (roots, leaves, and stems). These results reveal that Si mitigates LP stress by improving photosynthetic capacity, antioxidant potential, and nutrient homeostasis and that it can be used for agronomic management of vegetable crops in P-deficient soils.

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Section: Discussionsupporting

confidence: 83%

Section: Discussionmentioning

confidence: 64%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

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Silicon Compensates Phosphorus Deficit-Induced Growth Inhibition by Improving Photosynthetic Capacity, Antioxidant Potential, and Nutrient Homeostasis in Tomato

et al. 2019

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“…Remarkably, Si has been reported to alleviate a wide range of abiotic stresses, including radiation (Shen et al ., ), lodging (Savant et al ., ), wounding (Kim et al ., ), temperature (Muneer et al ., ), hypoxia (Fleck et al ., ), salinity (Flam‐Shepherd et al ., ), drought (Liu et al ., ), nutrient deficiency, such as that of iron (Fe; Pavlovic et al ., ), P (Kostic et al ., ) and K (Chen et al ., ), and metal toxicity (e.g. cadmium (Cd), Shao et al ., ; manganese (Mn), Che et al ., ; arsenic (As), Sanglard et al ., ; aluminum (Al), Wang et al ., ; and copper (Cu), Mateos‐Naranjo et al ., ).…”

Section: Silicon and Abiotic Stress: A Proliferation Of Proposed Mechmentioning

confidence: 99%

The controversies of silicon's role in plant biology

et al. 2018

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Contents Summary 67 I. Introduction 68 II. Silicon transport in plants: to absorb or not to absorb 69 III. The role of silicon in plants: not just a matter of semantics 71 IV. Silicon and biotic stress: beyond mechanical barriers and defense priming 76 V. Silicon and abiotic stress: a proliferation of proposed mechanisms 78 VI. The apoplastic obstruction hypothesis: a working model 79 VII. Perspectives and conclusions 80 Acknowledgements 81 References 81 SUMMARY: Silicon (Si) is not classified as an essential plant nutrient, and yet numerous reports have shown its beneficial effects in a variety of species and environmental circumstances. This has created much confusion in the scientific community with respect to its biological roles. Here, we link molecular and phenotypic data to better classify Si transport, and critically summarize the current state of understanding of the roles of Si in higher plants. We argue that much of the empirical evidence, in particular that derived from recent functional genomics, is at odds with many of the mechanistic assertions surrounding Si's role. In essence, these data do not support reports that Si affects a wide range of molecular-genetic, biochemical and physiological processes. A major reinterpretation of Si's role is therefore needed, which is critical to guide future studies and inform agricultural practice. We propose a working model, which we term the 'apoplastic obstruction hypothesis', which attempts to unify the various observations on Si's beneficial influences on plant growth and yield. This model argues for a fundamental role of Si as an extracellular prophylactic agent against biotic and abiotic stresses (as opposed to an active cellular agent), with important cascading effects on plant form and function.

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