Ecological Chemistry Group, Department of Chemistry , University of Los Andes , University Nucleus Pedro Rincón Gutiérrez, La Hechicera, 5101-A Mérida , Venezuela.
Allelopathy Group, Department of Organic Chemistry, School of Sciences, Institute of Biomolecules (INBIO) , University of Cadiz , C/República Saharaui, 7 , 11510 Puerto Real , Cádiz , Spain.
J Agric Food Chem. 2018 Apr 11;66(14):3666-3674. doi: 10.1021/acs.jafc.7b05489. Epub 2018 Apr 2.
The possibility of inducing polyploidy in grasses by treatment with colchicine and its effect on the production and root exudate content of 2,4-dihydroxy-7-methoxy-2 H-1,4-benzoxazin-3-one (DIMBOA) and 2,4-dihydroxy-2 H-benzoxazin-3-one (DIBOA) was studied in wheat, corn, and rye. Caryopses treated with colchicine at concentrations in the range of 0.1-10 mg/mL for 8 and 48 h and with inoculation of the growth medium are markedly affected in terms of both the distribution and concentration levels of allelochemicals in plants. A greater accumulation was observed in the root with respect to the stem, and this increased with an increasing concentration of colchicine and with treatment time. Analysis of the compounds released by root exudates showed that treatment with colchicine at a concentration higher than 1 mg/mL caused a significant increase in the concentrations of allelochemicals measured in the growth medium. It is proposed that treatment with colchicine of seedling caryopses mixoploids plant populations and that the overall effect is an increase in the levels of allelochemicals released. The ecological implications of this behavior are discussed along with the impact of plant-plant interactions (allelopathy).
用秋水仙素处理诱导禾本科植物多倍体的可能性及其对小麦、玉米和黑麦中 2,4-二羟基-7-甲氧基-2H-1,4-苯并恶嗪-3-酮（DIMBOA）和 2,4-二羟基-2H-苯并恶嗪-3-酮（DIBOA）的产生和根分泌物含量的影响进行了研究。用浓度范围为 0.1-10 mg/mL 的秋水仙素处理 8 和 48 小时，并接种生长培养基的 Caryopsis 在植物中 allelochemicals 的分布和浓度水平方面受到明显影响。在根中观察到比茎更高的积累，并且随着秋水仙素浓度和处理时间的增加而增加。对根分泌物释放的化合物进行分析表明，用浓度高于 1 mg/mL 的秋水仙素处理会导致生长培养基中测量的 allelochemicals 浓度显著增加。提出用秋水仙素处理幼苗 Caryopsis 杂种多倍体植物种群，总体效果是增加释放的 allelochemicals 水平。讨论了这种行为的生态意义以及植物-植物相互作用（化感作用）的影响。
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