Department of Plant Science, McGill University, Montreal, QC H9X 3V9, Canada.
Int J Mol Sci. 2023 Apr 1;24(7):6620. doi: 10.3390/ijms24076620.
Agriculture involving industrial fertilizers is another major human made contributing factor to soil pH variation after natural factors such as soil parent rock, weathering time span, climate, and vegetation. The current study assessed the potential effect of cell-free supernatant (CFS) obtained from EB2004S and EL2006H cultured at three pH levels (5, 7, and 8) on potato (var Goldrush) growth enhancement in a greenhouse pot experiment. The results showed that CFSs obtained from EB2004S and EL2006H cultured at pH 5 significantly improved photosynthetic rates, stomatal conductance, root fresh weight, and whole plant fresh weight. interactive effects of pot pH and that of CFSs obtained from pH 5 influenced chlorophyll, plant height, and shoot and whole plant fresh weight. Moreover, treatment 52EB2004S0.4% initiated early tuberization for potato grown at pH 7 and 8. Potato grown at pH 5, which received a 72EB2004S0.4% CFS treatment, had greater whole plant fresh and dry weight than that treated with EL2006H CFS and a positive control. Taken together, the findings of this study are unique in that it probed the effect of CFS produced under differing pH conditions which revealed a new possibility to mitigate stresses in plants.
农业中使用化肥是继土壤母岩、风化时间跨度、气候和植被等自然因素之后，导致土壤 pH 值变化的另一个主要人为因素。本研究评估了在三种 pH 值（5、7 和 8）下培养的 EB2004S 和 EL2006H 的无细胞上清液（CFS）对温室盆栽试验中马铃薯（Goldrush 品种）生长的潜在影响。结果表明，在 pH 5 下培养的 EB2004S 和 EL2006H 的 CFS 显著提高了光合速率、气孔导度、根鲜重和整株鲜重。盆 pH 值和 pH 5 下获得的 CFS 的交互作用影响了叶绿素、株高、茎和整株鲜重。此外，处理 52EB2004S0.4%在 pH 7 和 8 下促进了马铃薯的早期结薯。在 pH 5 下生长的马铃薯，接受 72EB2004S0.4% CFS 处理的整株鲜重和干重均大于接受 EL2006H CFS 处理和阳性对照的处理。总之，这项研究的结果是独特的，因为它探讨了在不同 pH 值条件下产生的 CFS 的影响，这为减轻植物压力提供了一种新的可能性。
