Effect of bio-silica on drought tolerance in plants

INTERNATIONAL BIOTECHNOLOGY CONFERENCE ON ESTATE CROPS 2017

Santi, Laksmita Prima^1 ; Nurhaimi-Haris^1 ; Mulyanto, D.^2

Indonesian Research Institute for Biotechnology and Bioindustry, Jalan Taman Kencana No.1, Bogor 16128, Indonesia^1

Pembangunan Nasional Yogyakarta University, Jalan SWK 104, Condongcatur Yogyakarta, Indonesia^2

关键词: Beneficial effects;    Biotic and abiotic stress;    Crop productivity;    Drought tolerances;    Environmental stress;    Monosilicic acid;    Root proliferation;    Stem elongations;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/183/1/012014/pdf
DOI  :  10.1088/1755-1315/183/1/012014

来源: IOP

【 摘 要 】

Drought is considered the single most devastating environmental stress, which decreases crop productivity more than any other environmental stresses. The main consequences of drought in crops are reduced rate of cell division, leaf size, stem elongation, root proliferation, disturbed stomatal oscillations, plant water and nutrient relations with diminished crop productivity. Many studies demonstrated that the deposition of silica in plant tissues can reduce drought stress. Silicon (Si) has beneficial effects on many crops, mainly under biotic and abiotic stress. Despite its abundance, silicon is never found in plants in an available form and is always combined with other elements, usually forming oxides or silicates. Monosilicic acid (H4SiO4) is the form of silicon used by plants, which is found both in liquid and adsorbed phases of silicon in soils. The concentration of the H4SiO4 in soil solution is influenced by the soil pH, clay, minerals, organic matter and Fe/Al oxides/hydroxides, which are collectively related to the geological age of the soil. Furthermore, to improve plant-available Si in the soil, silicate solubilizing microorganisms (SSM) are potentially useful in solubilizing insoluble forms of silicate. This paper aimed to review an important issue of bio-silica effects on plants under drought stress and water deficiency.