Contrasting interactions between photon spectra and temperature in cold-sensitive basil and cold-tolerant lettuce.

IF 4.1 2区 生物学 Q1 PLANT SCIENCES
Frontiers in Plant Science Pub Date : 2025-09-24 eCollection Date: 2025-01-01 DOI:10.3389/fpls.2025.1675087
Jiyong Shin, Bruce Bugbee, Erik S Runkle
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Abstract

Blue (B; 400-499 nm) light, far-red (FR; 700-750 nm) light, and temperature are key regulators of plant growth and development, with responses varying by species. While the independent effects of these environmental signals are well established, their interactive effects are not clear. We postulated that the effects of FR light and temperature would depend on the photon flux density (PFD) of B light. To test this, we grew cold-tolerant lettuce and cold-sensitive basil at 19 and 24°C under lighting treatments with three FR fractions [FR-PFD divided by the sum of red (600-699 nm) and FR PFD; 0.01, 0.19, or 0.32] and two B-PFDs (40 or 100 µmol m-2 s-1). The total PFD (400-750 nm; 270 µmol m-2 s-1) and photoperiod (24 h d-1) were the same in all treatments. There were significant differences between species. As expected, increasing the FR fraction dramatically increased shoot expansion in lettuce and internode elongation in basil. The shoot expansion in lettuce was amplified by higher temperature but attenuated by higher B-PFD. Unlike lettuce, the FR effect on basil internodes did not interact with either temperature or B-PFD. The increased shoot expansion in lettuce decreased foliage coloration, but coloration was minimally altered in basil. These results reveal fundamentally different species responses to light and temperature that may have implications for shade-avoidant and shade-tolerant species. Overall, these findings demonstrate the complex integration of environmental signals in the regulation of growth.

冷敏罗勒和耐冷生菜光子光谱与温度相互作用的对比。
蓝光(400-499 nm)、远红光(700-750 nm)和温度是植物生长发育的关键调控因子,不同物种的响应不同。虽然这些环境信号的独立影响已经确立,但它们的相互影响尚不清楚。我们假设FR光和温度的影响取决于B光的光子通量密度(PFD)。为了验证这一点,我们在19°C和24°C的光照条件下种植了耐寒生菜和冷敏感罗勒,并在光照条件下使用三个FR部分[FR-PFD除以红色(600-699 nm)和FR-PFD的和;0.01, 0.19,或0.32]和两个b - pfd(40或100µmol m-2 s-1)。所有处理的总PFD (400 ~ 750 nm; 270µmol m-2 s-1)和光周期(24 h d-1)相同。物种间存在显著差异。正如预期的那样,增加FR分数显著增加了生菜的芽伸长和罗勒的节间伸长。较高的温度对生菜茎部膨胀有促进作用,而较高的B-PFD则对其有抑制作用。与生菜不同,罗勒节间的FR效应与温度和B-PFD均无交互作用。生菜茎部扩张的增加降低了叶片的颜色,但罗勒的颜色变化最小。这些结果揭示了物种对光和温度的根本不同的反应,这可能对避荫和耐荫物种有影响。总的来说,这些发现表明环境信号在生长调节中的复杂整合。
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来源期刊
Frontiers in Plant Science
Frontiers in Plant Science PLANT SCIENCES-
CiteScore
7.30
自引率
14.30%
发文量
4844
审稿时长
14 weeks
期刊介绍: In an ever changing world, plant science is of the utmost importance for securing the future well-being of humankind. Plants provide oxygen, food, feed, fibers, and building materials. In addition, they are a diverse source of industrial and pharmaceutical chemicals. Plants are centrally important to the health of ecosystems, and their understanding is critical for learning how to manage and maintain a sustainable biosphere. Plant science is extremely interdisciplinary, reaching from agricultural science to paleobotany, and molecular physiology to ecology. It uses the latest developments in computer science, optics, molecular biology and genomics to address challenges in model systems, agricultural crops, and ecosystems. Plant science research inquires into the form, function, development, diversity, reproduction, evolution and uses of both higher and lower plants and their interactions with other organisms throughout the biosphere. Frontiers in Plant Science welcomes outstanding contributions in any field of plant science from basic to applied research, from organismal to molecular studies, from single plant analysis to studies of populations and whole ecosystems, and from molecular to biophysical to computational approaches. Frontiers in Plant Science publishes articles on the most outstanding discoveries across a wide research spectrum of Plant Science. The mission of Frontiers in Plant Science is to bring all relevant Plant Science areas together on a single platform.
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