Silicon ( Si ) is a works - beneficial element that can palliate the effects of abiotic and biotic stress . Plants are typically classified as Si collector based on foliar Si concentrations ( ≥1 % Si on a dry exercising weight basis for accumulators ) . By this definition , most greenhouse - grow ornamentals are low Si accumulators . However , plants that accumulate low foliar Si concentrations may still collect high Si concentrations elsewhere in the plant . to boot , screen cultivar for variability in Si uptake has not been investigated for humbled Si accumulator species . Therefore , the objective lens of this study was to assess cultivar variability in Si accumulation and distribution in petunia ( Petunia ×hybrida ) .
Eight cultivar ( Supertunia Black Cherry , Supertunia Limoncello , Supertunia Priscilla , Supertunia Raspberry Blast , Supertunia Royal Velvet , Supertunia Sangria Charm , Supertunia Vista Silverberry , and Supertunia White Improved ) were farm in a commercial-grade peat - based soilless substrate under distinctive greenhouse conditions . They were supplemented with either 2 MB m potassium silicate ( + Si ) or potassium sulfate ( -Si ) at every irrigation . Silicon subjoining increase foliage dry great deal ( 4.5 % ) but did not affect total ironic mass . In plants not receiving Si supplementation , leaf Si wander from 243 to 1295 mg·kg ⁻¹ , stem Si ranged from 48 to 380 mg·kg ⁻¹ , flower Si ranged from 97 to 437 mg·kg ⁻¹ , and root word Si ranged from 103 to 653 mg·kg ⁻¹. Silicon supplementation increase Si throughout the plant , but most predominantly in the source .
Leaf Si in the 2 megabyte meter Si handling ranged from 1248 to 3541 mg·kg ⁻¹ ( 173 % to 534 % increase ) , stem turn Si ranged from 195 to 654 mg·kg ⁻¹ ( 72 % to 376 % increase ) , blossom Si place from 253 to 1383 mg·kg ⁻¹ ( 74 % to 1082 % increase ) , and root Si place from 4018 to 10,457 mg·kg ⁻¹ ( 593 % to 9161 % addition ) . The great increase in root Si comply subjunction shifted Si dispersion within plants . In nonsupplemented plants , it ranged from 51.2 % to 76.8 % in leaves , 8.2 % to 40.2 % in stem , 2.8 % to 23.8 % in flower , and 1.2 % to 13.8 % in roots . In Si - add on plants , it range from 63.5 % to 67.7 % in leafage , 10.5 % to 22.6 % in solution , 9.4 % to 17.7 % in stems , and 1.6 % to 9.6 % in flowers . This study indicate that petunia , a low foliar Si collector , can hoard appreciable quantities of Si in roots when provided supplemental Si .
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Boldt , Jennifer & Altland , James . ( 2021 ) . Petunia ( Petunia ×hybrida ) Cultivars Vary in Silicon Accumulation and Distribution . HortScience . 56 . 1 - 8 . 10.21273 / HORTSCI15486 - 20 .
