U.S. Department of Agriculture, Agricultural Research Service, Plant Science Research Unit, Raleigh, 27607 NC, USA; Department of Crop and Soil Sciences, North Carolina State University, Raleigh, 27695 NC, USA.
U.S. Department of Agriculture, Agricultural Research Service, Plant Science Research Unit, Raleigh, 27607 NC, USA; Department of Crop and Soil Sciences, North Carolina State University, Raleigh, 27695 NC, USA.
Plant Sci. 2021 May;306:110855. doi: 10.1016/j.plantsci.2021.110855. Epub 2021 Feb 18.
Tropospheric ozone (O) is a pollutant that leads to significant global yield loss in soybean [Glycine max (L.) Merr.]. To ensure soybean productivity in areas of rising O, it is important to identify tolerant genotypes. This work describes the response of the high-yielding soybean cultivar 'Jake' to elevated O concentrations. 'Jake' was treated with either low O [charcoal-filtered (CF) air, 12 h mean: 20 ppb] or with O-enriched air (12 h mean: 87 ppb) over the course of the entire growing season. In contrast to the absence of O-induced leaf injury under low O, elevated O caused severe leaf injury and decreased stomatal conductance and photosynthesis. Although elevated O reduced total leaf area, leaf number, and plant height at different developmental stages, above-ground and root biomass remained unchanged. Analyzing carbon and nitrogen content, we found that elevated O altered allocation of both elements, which ultimately led to a 15 % yield loss by decreasing seed size but not seed number. We concluded that cultivar 'Jake' possesses developmental strength to tolerate chronic O conditions, attributes that make it suitable breeding material for the generation of new O tolerant lines.
对流层臭氧（O）是一种污染物，会导致大豆 [Glycine max (L.) Merr.] 的全球产量显著下降。为了确保在臭氧升高地区的大豆生产力，识别耐受基因型很重要。本工作描述了高产大豆品种'Jake'对升高的 O 浓度的响应。'Jake'在整个生长季节都接受低 O（木炭过滤（CF）空气，12 h 均值：20 ppb）或 O 富集空气（12 h 均值：87 ppb）处理。与低 O 下没有 O 诱导的叶片损伤形成对比，升高的 O 导致严重的叶片损伤，降低了气孔导度和光合作用。尽管升高的 O 减少了不同发育阶段的总叶面积、叶数和株高，但地上和根生物量保持不变。分析碳和氮含量，我们发现升高的 O 改变了两种元素的分配，最终通过减少种子大小而不是种子数量导致 15%的产量损失。我们得出结论，品种'Jake'具有耐受慢性 O 条件的发育优势，使其成为培育新的 O 耐受系的合适育种材料。
