Interactions Between Light Intensity and Phosphorus Nutrition Affect the P Uptake Capacity of Maize and Soybean Seedling in a Low Light Intensity Area

Abstract

To capture more nutrients, root systems of maize ( Zea mays L.) and soybean ( Glycine max L.) exhibit morphological and physiological plasticity to a localized supply of phosphorus (P). However, the mechanisms of the interaction between light intensity and P affecting root morphological and physiological alterations remain unclear. In the present study, the regulation of P uptake capacity of maize and soybean by light intensity and localized P supply was investigated in a low solar radiation area. The plants were grown under continual and disrupted light conditions with homogeneous and heterogeneous P supply. Light capture of maize and soybean increased under the disrupted light condition. Plant dry weight and P uptake were increased by more light capture, particularly when plants were grown in soil with heterogeneous P supply. Similarly, both localized P supply and disrupted light treatment increased the production of fine roots and specific root length in maize. Both homogeneous P supply and disrupted light treatment increased the malate and citrate exudation in the root of soybean. Across all of the experimental treatments, high root morphological plasticity of maize and root physiological plasticity of soybean were associated with lower P concentrations in leaves and greater sucrose concentrations in roots. It is suggested that the carbon (C), exceeded shoot growth capabilities and was transferred to roots as sucrose, which may serve as both a nutritional signal and a C-substrate for root morphological and physiological changes.

Light Intensity and Biofertilizers Effect on Natural Indigo Production and Nutrient Uptake of Indigofera tinctoria L.

“…Phosphate uptake at 100% light intensity was not significantly different from 50% light intensity. The results of this study are in line with Zhou et al (2019) that the highest phosphate uptake and dry weight of plants found at high light intensity. Biofertilizer also had a significant effect on phosphate uptake (Table 8).…”

Variation Analysis of Root System Development in Wheat Seedlings Using Root Phenotyping System

“…The germination paper-based approach developed by Hund et al [21] required a plastic covering that stuck to the root and required intervention to remove the covering [24]. Although modified forms of this growth pouch have been reported [12,[24][25][26], there is still a knowledge gap yet to be filled in the development of root phenotyping systems and high-throughput screenings of wheat. The wheat accessions selected for this study have never been reported for root variation analysis to the best of our knowledge.…”

Special issue in honour of Prof. Reto J. Strasser - JIP-test as a tool for early diagnostics of plant growth and flowering upon selected light recipe

“…Based on recent literature data, we summarised our results in a model according to which the light intensity controls allocation of sugars between the shoot and the root (Fig. 3SA, supplement; Sakuraba et al 2018, van Gelderen et al 2018aZhou et al 2019). Under BRS light, a redirection of assimilates occurs towards the shoot and for flowering.…”

“…3SA). Different studies demonstrated that high light intensity and red light can indeed promote nutrient assimilation and induce specific signaling cascades from the shoot to the root which promote root development, as well as exudation of organic acids in the rhizosphere (Cheng et al 2014, Sakuraba et al 2018, van Gelderen et al 2018aZhou et al 2019). These discoveries revealed that light is not only involved in the synthesis and transportation of sugars Fig.…”