Photomorphogenesis and content of carbohydrates in the axial organs of field pean seedlings under the influence of selective light

IF 0.1 Q4 INTERNATIONAL RELATIONS
V. Zhmurko, O. O. Avksentieva, Y. Batuieva
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引用次数: 0

Abstract

Background: Light is a multifaceted exogenous factor that plays an important role in plant growth and development. The spectral composition of light is determinative for the regulation of photomorphogenetic processes in plants. Nowadays plants have several groups of photoreceptors that include receptors of red (RL) and far red light (FRL) — phytochromes; receptors of UV-A, blue (BL) and green (GL) light — cryptochromes, phototropins, proteins of the ZEITLUPE family, as well as the UV-B receptor — UVR8 protein. One of the possible mechanisms that realize an activation of photoreceptor systems in the plant may be concerned with carbohydrate metabolism. The research of morphogenetic reactions of seedlings under the action of selective light irradiation by activating photoreceptor systems is important for understanding the mechanisms of regulation of the program of plant organism`s ontogenesis. The aim of this study was to investigate the effect of selective light of different spectrum: RL (660 nm), GL (530 nm) and BL (450 nm) on growth reactions, morphogenesis and content of soluble carbohydrate in axial organs of seedlings of long-day plants. Materials and methods: 10-day etiolated seedlings of pea Maecenat variety were used for experiments. Activation of photoreceptor systems by red (RL, 660nm), green (GL, 530nm) and blue (BL, 450nm) light was performed for 5 days for 30 minutes using LED matrices. The growth reaction, morphogenesis and the content of soluble mono- and oligosugars in the axial organs of seedlings were analyzed. Results: The axial organs of seedlings differ in their response to irradiation with selective light. The root system is more sensitive to the action of selective light than the shoot of the seedlings of the long-day plants of the pea Maecenat variety. Activation of photoreceptor systems stimulates growth processes, activates the processes of photomorphogenesis and the biosynthesis of oligosugars de novo, most likely sucrose. Among the spectra of selective light, the maximum stimulating effect is shown by irradiation of the GL (530 nm) in the reactions of the aboveground part and roots. RL (660 nm) and BL (450 nm) show opposite effects: RL initiates a photomorphogenetic program of shoot part, and BL has a greater effect on photomorphogenesis of root system. Conclusions: Different levels of growth, morphogenetic processes and changes in the content of soluble carbohydrates are probably related to the ability of photoreceptor systems to activate the realization of different ways of photomorphogenesis in the axial organs of seedlings under the influence of selective light of a certain spectrum.
选择性光对大田豌豆幼苗轴向器官光形态发生及碳水化合物含量的影响
背景:光是一个多方面的外源因素,在植物生长发育过程中起着重要的作用。光的光谱组成对植物光形态发生过程的调控起决定性作用。现在植物有几组光感受器,包括红光(RL)和远红光(FRL)的感受器-光敏色素;UV-A受体、蓝光(BL)和绿光(GL)隐色素、趋光蛋白、ZEITLUPE家族蛋白以及UV-B受体- UVR8蛋白。在植物中实现光感受器系统激活的可能机制之一可能与碳水化合物代谢有关。研究在选择性光照射下激活光感受器系统的幼苗形态发生反应,对于了解植物生物个体发生过程的调控机制具有重要意义。本研究旨在研究RL (660 nm)、GL (530 nm)和BL (450 nm)不同光谱对长日照植物幼苗生长反应、形态发生和轴向器官可溶性碳水化合物含量的影响。材料与方法:以豌豆Maecenat品种10天黄化苗为试验材料。使用LED基质,用红光(RL, 660nm)、绿光(GL, 530nm)和蓝光(BL, 450nm)激活光感受器系统,持续5天,持续30分钟。分析了幼苗轴器官的生长反应、形态发生及可溶性单糖和低糖含量。结果:不同幼苗轴向器官对选择性光照射的响应不同。长日照豌豆品种的根系对选择性光的作用比幼苗的茎部更敏感。光感受器系统的激活刺激了生长过程,激活了光形态形成过程和低聚糖(很可能是蔗糖)的生物合成。在选择性光光谱中,GL (530 nm)照射对地上部分和根部反应的刺激作用最大。RL (660 nm)和BL (450 nm)表现出相反的作用,RL启动了茎部的光形态发生程序,而BL对根系光形态发生的影响更大。结论:不同水平的生长、形态发生过程和可溶性碳水化合物含量的变化,可能与幼苗轴向器官在一定光谱选择性光的影响下,光感受器系统激活实现不同方式光形态发生的能力有关。
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来源期刊
Meridiano 47-Journal of Global Studies
Meridiano 47-Journal of Global Studies INTERNATIONAL RELATIONS-
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19
审稿时长
12 weeks
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