Technical development for in situ measurement of labile silicate in waters and soils

Guan, Dong-Xing; Wei, Tian-Jiao; Yu, Guang-Hui; Luo, Jun; Li, Gang

doi:10.1016/j.eti.2024.103613

Cited by 2 publications

(1 citation statement)

References 38 publications

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“…In Experiment 1, the rice plants were cultivated in pots filled with sand and irrigated 2−3 times a week with 50 mL 1/2 strength Hoagland nutrient solution containing 20 μmol L −1 P. In the second week, 1.5 mmol L −1 silicic acid, which was prepared by passing the potassium silicate solution through ion-exchange resin (Amberlite IR120B, H + form), 26 was added to the nutrient solution. The sand was kept moist through daily spraying with sterilized deionized water.…”

Section: Experimental Designmentioning

confidence: 99%

Mechanisms of Arbuscular Mycorrhizal Fungi Increasing Silicon Uptake by Rice

Qiu,

Guan,

Liu

et al. 2024

J. Agric. Food Chem.

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Arbuscular mycorrhizal fungi (AMF) influence silicon (Si) uptake by plants, but the mechanisms remain unclear. This study investigated the mechanisms of AMF-mediated Si uptake by rice, a model Si-accumulating plant, and explored the tripartite interactions among AMF, Si, and phosphorus (P). AMF inoculation increased shoot Si content by 97% when supplied with silicic acid and by 29% with calcium silicate and upregulated expression of Si transporters Lsi1 and Lsi2 in roots. Supplying Si only to AMF hyphae increased the root Si content by 113%, indicating direct Si uptake by hyphae. Mechanisms of AMF-induced Si uptake were elucidated: 1) direct Si uptake by hyphae, 2) increased silicate dissolution, and 3) upregulation of Si transporters. Silicon application also increased AMF colonization by 28%, and the absence of interactions was observed on P uptake. Altogether, AMF support Si acquisition and Si fosters AMF colonization in rice, whereas the P uptake depends more on AMF than on Si.

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Section: Experimental Designmentioning

confidence: 99%