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Agronomy
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Molecular Regulatory Network of Plant Nutrition Signaling
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Molecular Regulatory Network of Plant Nutrition Signaling

A special issue of Agronomy (ISSN 2073-4395). This special issue belongs to the section "Plant-Crop Biology and Biochemistry".

Deadline for manuscript submissions: closed (31 January 2025) | Viewed by 2838

Special Issue Editors

Dr. Yunfei Wu

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Guest Editor
College of Bioscience and Biotechnology, Yangzhou University, Yangzhou 225009, China
Interests: crops nutrition; nitrogen transport and assimilation
Dr. Alessio Aprile

E-Mail Website
Guest Editor
1. Department of Biological and Environmental Sciences and Technologies, Salento University, 73100 Lecce, Italy
2. Centro Ecotekne via Provinciale Lecce Monteroni, 73100 Lecce, Italy
Interests: mechanisms of mineral nutrient uptake in plants; impact of heavy metals on plant nutrient homeostasis; role of the rhizosphere microbiome in plant nutrient and heavy metal dynamics; sustainable agricultural practices for managing mineral nutrition and mitigating heavy metal stress
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

From the current practical situation, it can be seen that nutrients play a crucial role in the growth of soil plants. Therefore, in order to ensure that agriculture can adhere to the concept of sustainable development, research should be conducted on the nutrient redistribution of plants, and existing problems should be identified and solved. The absorption and utilization of mineral nutrients are often overlooked traits in the study of crop origin and evolution. For example, after analyzing the genes encoding ammonia ion transporters in common wild rice, 24 subtypes were found, while only 4 subtypes were retained in cultivated rice, with efficient transport of Hap-1 accounting for 96.3% of cultivated varieties. Therefore, the absorption and metabolism of some important nutrients may be important domestication target traits, and related genes should be given attention in future research. Coping with this challenge requires improving the productivity of major crops, alongside increasing crop diversity and developing new crops highly adapted to different soil conditions. In this respect, both crops grown in new areas or for new uses, as well as newly domesticated plant species, are considered new crops. The introduction of any new crop requires comprehensive studies of various aspects, including management, physiology, genetics, breeding, yield production, quality, and utilization. In this Special Issue, we aim to exchange knowledge on any aspect related to new crops for nutrition distribution, thus facilitating their introduction and improving crop production in these harsh environments.

Dr. Yunfei Wu
Dr. Alessio Aprile
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Agronomy is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • plant
  • nutrition
  • physiology
  • genetics
  • yield
  • quality

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Published Papers (3 papers)

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Research

13 pages, 8030 KiB  
Article
ABA Affects Distinctive Rice Caryopses Physicochemical Properties on Different Branches
by Yunfei Wu, Ebenezer Ottopah Ansah, Licheng Zhu, Wenchun Fang, Leilei Wang, Dongping Zhang and Baowei Guo
Agronomy 2024, 14(11), 2632; https://doi.org/10.3390/agronomy14112632 - 8 Nov 2024
Viewed by 525
Abstract
Abscisic acid (ABA) plays an important regulatory role in the grain filling process, which in turn will affect the final yield and quality of rice. The ABA biosynthesis genes of OsNCED3 and degradation gene OsABA8ox3 affect the ABA content, and then further regulate [...] Read more.
Abscisic acid (ABA) plays an important regulatory role in the grain filling process, which in turn will affect the final yield and quality of rice. The ABA biosynthesis genes of OsNCED3 and degradation gene OsABA8ox3 affect the ABA content, and then further regulate the ABA signaling. During the development of rice panicle, compared with primary grains (superior grains) growing on primary branches, secondary grains (inferior grains) growing on secondary branches exhibit characteristics. However, little is reported on the physicochemical characteristics of starch between superior and inferior grains in ABA related transgenic lines. In this study, OsNCED3 and OsABA8ox3 transgenic plants were used as materials. The results showed that compared with the WT, the OsNCED3-RNAi lines on grain weight was consistent with the trend of superior and inferior grains, while the OsABA8ox3-RNAi lines affected superior or inferior grains. The total starch and soluble sugar content of grains decreased in both OsNCED3-RNAi and OsABA8ox3-RNAi lines, and the total starch content of superior and inferior grains in OsABA8ox3-RNAi lines decreased. The starch granule size distribution of all samples showed a bimodal and increased proportion of starch grains with large granule size, in which the influence on inferior grains was greater than that of superior grains, which eventually led to a significant increase in their average granule size. The apparent amylose content of inferior grains increased significantly in most lines. The swelling power of the superior grains decreased significantly, while that of the inferior grains increased significantly. Fourier analysis showed that the order degree of starch granule surface decreased in the superior grains of the RNAi line, while it increased in the inferior grains of the OsABA8ox3-RNAi line but decreased in the OsNCED3-RNAi lines. In the superior grains, the relative crystallinity of starch decreased in the OsNCED3-RNAi lines, but remained unchanged or increased in the OsABA8ox3-RNAi line. In inferior grains, the relative crystallinity of starch decreased in the ABA synthesis RNAi line, but increased in the OsABA8ox3-RNAi line. In summary, the influence of ABA on the physicochemical properties of inferior grains is greater than that of superior grains. Full article
(This article belongs to the Special Issue Molecular Regulatory Network of Plant Nutrition Signaling)
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20 pages, 2263 KiB  
Article
Response of Different Exogenous Phytohormones to Rice Yield Under Low-Temperature Stress at the Filling Stage
by Ke Li, Yunji Xu, Dalu Gu, Xiaodong Yin, Yanyan Jia, Tinggang Wen, Weiqing Jiang, Yang Che, Qisheng Li, Zhangrong Wen, Xiaofeng Du and Wenfei Yang
Agronomy 2024, 14(10), 2450; https://doi.org/10.3390/agronomy14102450 - 21 Oct 2024
Cited by 1 | Viewed by 1060
Abstract
This paper aims to clarify the effects of different exogenous phytohormones on the physiological traits of rice (Oryza sativa L.) at the early stage of irrigation under low-temperature stress. In this study, two types of rice varieties with different temperature sensitivities screened [...] Read more.
This paper aims to clarify the effects of different exogenous phytohormones on the physiological traits of rice (Oryza sativa L.) at the early stage of irrigation under low-temperature stress. In this study, two types of rice varieties with different temperature sensitivities screened out previously, namely, a cold-tolerant variety (Nan Jing 9108) and a low-temperature-sensitive variety (Hui Liang You 898), were used in pots to simulate the process of low-temperature stress in rice at the early stage of grouting (6–9 days after anthesis) with artificial low-temperature treatments. The experimental treatments were 450 mg L−1 Methyl jasmine acid (MJ), 46 mg L−1 Melatonin (MT), 69 mg L−1 Salicylate (SA), 40 mg L−1 Erythromycin (GA3), 25 mg L−1 Zeatin (Z), 145 mg L−1 Spermidine (SPD), and 5 mg L−1 Abscisic acid (ABA) sprayed on rice before low-temperature stress, while low-temperature treatment without spraying (DK) and conventional planting without spraying (CK) were added as the control. The results showed that compared with the room temperature control (CK, sprayed with deionized water), the low-temperature control (DK, low-temperature treatment, and sprayed with deionized water) all significantly reduced the rice grain yield. Different exogenous hormones sprayed before low-temperature stress could increase rice yield, among which, Z and SPD spraying treatments had a better effect on the yield of Hui Liang You 898, while different exogenous hormone treatments increased the yield of Nan Jing 9108 in an average manner. The Z and SPD treatments increased the yield of Hui Liang You 898 by 24.87% and 26.16% and that of Nan Jing 9108 by 15.87% and 17.80%, respectively. This was mainly attributed to the significant increase in thousand-grain weight and fruiting rate, while there was no significant difference in the number of spikes and number of grains. The different exogenous hormone treatments were able to delay leaf senescence, enhance the photosynthetic production capacity of plants by increasing leaf chlorophyll content, and thus increase the accumulation of photosynthetic assimilation products and population growth rate after flowering. Among them, both Z and SPD treatments resulted in a population growth rate of more than 30% from spike flushing to maturity, which led to a higher dry matter accumulation of the plant at maturity. In addition, in the dry matter distribution of the plant at maturity, the seeds occupied a higher accumulation amount and proportion compared with the respective DK; the SPD treatment resulted in the maximum distribution rate of seeds at maturity of Hui Liang You 898, with an increase of 8.27%, and the Z treatment resulted in the maximum distribution rate of seeds at maturity of Nan Jing 9108, with an increase of 7.34%. At the same time, the Z treatment significantly increased the activities of adenosine diphosphate glucose phosphorylated enzyme (AGP) and starch branching enzyme (SBE) in the grains of both varieties, which resulted in the accumulation of more starch and ultimately increased the rice grain yield. The results verified that different exogenous phytohormones could be used to regulate the insufficiency of grouting caused by low-temperature stress during the grouting and fruiting stages of rice and enriched their agronomic and physiological traits in response at the same time. Full article
(This article belongs to the Special Issue Molecular Regulatory Network of Plant Nutrition Signaling)
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15 pages, 1297 KiB  
Article
Construction of Bacillus–Pseudomonas Synthetic Communities and Development of Bio-Nursery Substrates
by Qisheng Li, Qing Li, Xiaodong Yin, Yanyan Jia, Kai Yang, Jiamin Song, Yang Che, Ke Li, Zhangrong Wen, Dalu Gu, Xiaofeng Du and Wenfei Yang
Agronomy 2024, 14(9), 2179; https://doi.org/10.3390/agronomy14092179 - 23 Sep 2024
Viewed by 915
Abstract
With the rapid development of ecological agriculture and organic products, there is an urgent need to reduce the use of fertilizers and pesticides by producing bio-nursery substrates containing multifunctional microbial communities. In this study, beneficial Pseudomonas strains were screened from the rhizosphere of [...] Read more.
With the rapid development of ecological agriculture and organic products, there is an urgent need to reduce the use of fertilizers and pesticides by producing bio-nursery substrates containing multifunctional microbial communities. In this study, beneficial Pseudomonas strains were screened from the rhizosphere of muskmelon (Cucumis melo L.) pre-inoculated with Bacillus velezensis R1-3. The ability of the strain to dissolve phosphorus and produce indole-3-acetic acid (IAA), the effect of the strain on seed germination rate, and the antagonism with R1-3 were determined. Four strains of beneficial Pseudomonas strains that had no antagonistic effect against R1-3 were obtained and formed a Bacillus–Pseudomonas community. The seedling effect of biological substrates containing the Bacillus–Pseudomonas community was evaluated using a seedling pot experiment and a pot experiment. The results showed that the phosphorus solubilization range of all Pseudomonas strains was 86.32–459.48 mg L−1 and the IAA production range was 2.98–11.86 mg L−1. There was a significant negative correlation between the amount of phosphorus dissolved in the fermentation solution and pH. Combined with the results of the seed germination rate and antagonism test, the strains R1-3 + HY-S7, R1-3 + HY-S25, R1-3 + HY-S36, and R1-3 + HY-S70 were selected for the seedling pot experiment and the pot experiment. The results of the two-season seedling culture and two-season pot experiments showed that the bio-nursery substrates containing the bacterial community R1-3 + HY-S70 significantly promoted the growth of muskmelon seedlings, improved plant height, maximum leaf length, and fresh weight, and were significantly better than single bacterial and control treatments at increasing plant height and fresh weight. Finally, the bacterial community R1-3 + HY-S70 was established as the optimal combination for developing biological seedling substrates. Based on 16S rDNA gene sequence analysis, the strain HY-S70 was preliminarily identified as Pseudomonas moraviensis. Full article
(This article belongs to the Special Issue Molecular Regulatory Network of Plant Nutrition Signaling)
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