The seeds of hybrid rice cv. Shanyou 63 were soaked in IPT(isoprothiolane) solution with various concentrations (0.1~100.0 mg/L) for 24h. It was found that 0.1 mg/L IPT significantly promoted the length of seminal root and crown roots, and 0.1~100.0 mg/L IPT significantly promoted the lateral root number in seminal root.
The lateral roots of soybean seedling were remarkanly increaced after the soybean seeds soaking different concentration solutions of epi BR and Y-6. 88. 76% increace by 0.1×10-6 g/mL BR, and 176. 96 % by 0. 05×10-6g/mL Y-6. These treatments did not notably inhibit the growth of main roots.
Roots are thicker and sturdier, lateral roots d evelop faster, the number of lateral roots is larger, elementary lateral roots d evelop under 0.2~0.6 cm surface soil.
The number of lateral root in H. moscheutos and two wheat genotypes was relatively insensitive to AlCl3. When treated with 50μmol/L AlCl3 for 48 hours, roots biomass of the two wheat genotypes decreased significantly, but the roots biomass of H. moscheutos was not affected, suggesting that seedlings of H. moscheutos could be more tolerant to Al than those of the two wheat genotypes.
Eighteen QTLs were detected for seminal root length (SRL), adventitious root number (ARN), and lateral root length (LRL) and lateral root number (LRN) on the seminal root at a soil depth of from 3 to 6?cm under flooding and upland conditions.
Only 0.01 μm IAA significantly enhanced lateral root number, whereas at the higher concentrations IBA, although inhibitory, was the least effective auxin.
Plants from both studies were evaluated during autumn of the establishment year for taproot diameter (TD), lateral root number (LRN), lateral root diameter (LRD), lateral root position (LRP), and fibrous root mass (FRM).