Beyond grasses: the potential benefits of studying silicon accumulation in non-grass species

Katz, Ofir

doi:10.3389/fpls.2014.00376

Cited by 66 publications

(60 citation statements)

References 39 publications

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“…The effects of Si on salt-stressed tomatoes have also been investigated extensively (Zhu and Gong, 2014). These observations may be consistent with Katz (2014), who suggested the regulation of Si on low Si-accumulating plants is not insignificant.…”

Section: Introductionsupporting

confidence: 52%

Effects of silicon on absorbed light allocation, antioxidant enzymes and ultrastructure of chloroplasts in tomato leaves under simulated drought stress

Cao

Ma²,

Zhao

et al. 2015

Scientia Horticulturae

125

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Section: Introductionsupporting

confidence: 52%

Effects of silicon on absorbed light allocation, antioxidant enzymes and ultrastructure of chloroplasts in tomato leaves under simulated drought stress

Cao

Ma²,

Zhao

et al. 2015

Scientia Horticulturae

125

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“…It is also possible that water extractable soil Si was not a good indicator of Si availability for Group H trees, which may be better estimated by stronger extractants such as acetate buffer (Synder, 2001). These results would support the importance of silicon utilization by noncrop tree species which are increasingly pointed out (Cooke, DeGabriel, & Hartley, 2016;Cooke & Leishman, 2011b;Katz, 2014).…”

Section: Discussionmentioning

confidence: 88%

Spatial variations of soil silicon availability and biogenic silicon flux in a lowland tropical forest in Malaysia

Ishizawa

Niiyama

Iida

et al. 2019

Ecological Research

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Tropical tree species differ widely in their silicon (Si) accumulation patterns, but the implications of such species differences for ecosystem Si flux remain unexplored. We analyzed how biogenic Si flux via leaf litter and soil Si availability in the upper soil vary spatially within a 2 ha area in a lowland Dipterocarp forest in Peninsular Malaysia. Silicon concentration per unit leaf dry mass of 86 dominant tree species in this plot ranged from 0.4 to 126 mg/g. Soil Si availability at 100 sampling points and Si flux via leaf litter at 66 litter traps showed large variations up to 3.3‐ and 17.9‐folds, respectively. However, they correlated neither with each other nor with the expected Si flux from tree species composition in the neighborhood. When we classified tree species to four groups by their leaf Si concentrations (negligible, low, moderate and high), tree species with moderate leaf Si concentrations were significantly more abundant on Si‐rich soils. In contrast, the other three groups did not show any significant spatial relationships with soil Si availability. These results indicate that soil Si availability, Si accumulation by vegetation and Si flux via leaf litter show wide spatial variations in a lowland tropical forest, without a simple relationship with each other.

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“…Si accumulation capacity, or plant family as a surrogate, could be an important factor affecting how stressed plants use Si to alleviate abiotic stress. Silicon is considered most important for high accumulating families, despite acknowledgment of functional roles in species that accumulate little Si (Katz ). The physical functions of Si, such as cuticular deposition to reduce transpiration, may be limited to high accumulating species as a build‐up of silica is required (Raven ; Ma & Yamaji ; Massey & Hartley ).…”

Section: Introductionmentioning

confidence: 99%

Consistent alleviation of abiotic stress with silicon addition: a meta‐analysis

2016

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Summary1. Hundreds of single species studies have demonstrated the facility of silicon (Si) to alleviate diverse abiotic stresses in plants. Understanding of the mechanisms of Si-mediated stress alleviation is progressing, and several reviews have brought information together. A quantitative assessment of the alleviative capacity of Si, however, which could elucidate plant Si function more broadly, was lacking. 2. We combined the results of 145 experiments, predominantly on agricultural species, in a meta-analysis to statistically assess the responses of stressed plants to Si supply across multiple plant families and abiotic stresses. We interrogated our database to determine whether stressed plants increased in dry mass and net assimilation rate, oxidative stress markers were reduced, antioxidant responses were increased and whether element uptake showed consistent changes when supplied with Si. 3. We demonstrated that across plant families and stress types, Si increases dry weight, assimilation rate and chlorophyll biosynthesis and alleviates oxidative damage in stressed plants. In general, results indicated that plant family (as a proxy for accumulator type) and stress type had significant explanatory power for variation in responses. The consistent reduction in oxidative damage was not mirrored by consistent increases in antioxidant production, indicative of the several different stress alleviation mechanisms in which Si is involved. Silicon addition increased K in shoots, decreased As and Cd in roots and Na and Cd in shoots. Silicon addition did not affect Al, Ca or Mn concentration in shoots and roots of stressed plants. Plants had significantly lower concentrations of Si accumulated in shoots but not in roots when stressed. 4. Meta-analyses showed consistent alleviation by Si of oxidative damage caused by a range of abiotic stresses across diverse species. Our findings indicate that Si is likely to be a useful fertilizer for many crops facing a spectrum of abiotic stresses. Similarities in responses across families provide strong support for a role of Si in the alleviation of abiotic stress in natural systems, where it has barely been explored. We suggest this role may become more important under a changing climate and more experiments using non-agricultural species are now needed.

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Beyond grasses: the potential benefits of studying silicon accumulation in non-grass species

Cited by 66 publications

References 39 publications

Effects of silicon on absorbed light allocation, antioxidant enzymes and ultrastructure of chloroplasts in tomato leaves under simulated drought stress

Effects of silicon on absorbed light allocation, antioxidant enzymes and ultrastructure of chloroplasts in tomato leaves under simulated drought stress

Spatial variations of soil silicon availability and biogenic silicon flux in a lowland tropical forest in Malaysia

Consistent alleviation of abiotic stress with silicon addition: a meta‐analysis

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