Suárez Iván Darío Samur, Hsiang Tom, Goodwin Paul H
School of Environmental Sciences, University of Guelph, 50 Stone Road East, Guelph, ON N1G 2W1, Canada.
Plants (Basel). 2025 Jul 9;14(14):2110. doi: 10.3390/plants14142110.
Four biostimulants (phycocyanin, γ-aminobutyric acid (GABA), glycine betaine (GB), and the mycorrhizal fungus ) were applied foliarly to six cultivars of mature creeping bentgrass () under non-stressed greenhouse conditions. Phycocyanin was most effective at increasing total shoot greenness, which was most consistent over time with the cultivars Penncross, T1, and Tyee. GABA was most effective at increasing total root fresh and dry weight, most strongly for Penncross and T1, respectively. GB was most effective at increasing total shoot fresh and dry weight, with both most strongly increased for Tyee. By comparison, had relatively low effectiveness for increasing any of these parameters. The appearance of the grass at the end of the experiment revealed that 007 and Focus generally showed the most and least growth benefit, respectively, with all four biostimulants. However, all cultivars showed increases in more than one parameter for each biostimulant, and thus, no cultivar was uniformly responsive or non-responsive to all the biostimulants. This research shows that phycocyanin, GABA, and GB may benefit multiple creeping bentgrass cultivars under non-stressed conditions, but each one tended to be more beneficial to a particular aspect of plant growth and quality. End users need to be aware of the importance of creeping bentgrass genotype when considering biostimulant application.
在非胁迫温室条件下，对6个成熟匍匐翦股颖品种叶面施用4种生物刺激素（藻蓝蛋白、γ-氨基丁酸（GABA）、甘氨酸甜菜碱（GB）和菌根真菌）。藻蓝蛋白在增加地上部总绿度方面最有效，在品种Penncross、T1和Tyee上随时间变化最为一致。GABA在增加根系总鲜重和干重方面最有效，分别在Penncross和T1上增加最为显著。GB在增加地上部总鲜重和干重方面最有效，在Tyee上两者增加最为显著。相比之下，菌根真菌在增加这些参数中的任何一个方面效果相对较低。试验结束时草坪草的外观显示，对于所有4种生物刺激素，007和Focus通常分别表现出最大和最小的生长效益。然而，每个生物刺激素处理下的所有品种在多个参数上均有增加，因此，没有一个品种对所有生物刺激素都一致响应或不响应。本研究表明，在非胁迫条件下，藻蓝蛋白、GABA和GB可能对多个匍匐翦股颖品种有益，但每种生物刺激素往往对植物生长和品质的特定方面更有益。终端用户在考虑施用生物刺激素时需要意识到匍匐翦股颖基因型的重要性。
