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相关概念视频

Overview of Metabolism01:40

Overview of Metabolism

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Living cells constantly carry out various chemical reactions which are necessary for their proper functioning. These reactions are interlinked to one another via multiple pathways. The collection of these chemical reactions is known as metabolism.
Plant Metabolism
Sunlight, the primary source of energy in plants, is first absorbed by the chlorophyll pigments present in their leaves. Plants then use this energy to carry out photosynthesis, where water is oxidized into oxygen and carbon dioxide...
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Overview of Nitrogen Metabolism01:20

Overview of Nitrogen Metabolism

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Nitrogen is a very important element for life because it is a major constituent of proteins and nucleic acids. It is a macronutrient, and in nature, it is recycled from organic compounds and stored in the form of  ammonia, ammonium ions, nitrate, nitrite, or  nitrogen gas by many metabolic processes. Many of these metabolic processes are carried out only by prokaryotes.
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
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Key Elements for Plant Nutrition02:35

Key Elements for Plant Nutrition

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Like all living organisms, plants require organic and inorganic nutrients to survive, reproduce, grow and maintain homeostasis. To identify nutrients that are essential for plant functioning, researchers have leveraged a technique called hydroponics. In hydroponic culture systems, plants are grown—without soil—in water-based solutions containing nutrients. At least 17 nutrients have been identified as essential elements required by plants. Plants acquire these elements from the...
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The Roles of Bacteria and Fungi in Plant Nutrition02:11

The Roles of Bacteria and Fungi in Plant Nutrition

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Plants have the impressive ability to create their own food through photosynthesis. However, plants often require assistance from organisms in the soil to acquire the nutrients they need to function correctly. Both bacteria and fungi have evolved symbiotic relationships with plants that help the species to thrive in a wide variety of environments.
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The Calvin Benson Cycle01:46

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Ribulose 1,5- bisphosphate carboxylase/oxygenase (RuBisCo) is a critical enzyme that catalyzes carbon dioxide assimilation during photosynthesis. However, it is an inefficient enzyme, having an extremely slow catalytic rate. A typical enzyme can process about a thousand molecules per second; however, RuBisCo fixes only around three-carbon dioxides per second. Photosynthetic cells compensate for this slow rate by synthesizing very high amounts of RuBisCo, making it the most abundant single...
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The Nitrogen Cycle01:49

The Nitrogen Cycle

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Nitrogen atoms, present in all proteins and DNA, are recycled between abiotic and biotic components of the ecosystem. However, the primary form of nitrogen on Earth is nitrogen gas, which cannot be used by most animals and plants. Thus, nitrogen gas must first be converted into a usable form by nitrogen-fixing bacteria before it can be cycled through other living organisms. The use of nitrogen-containing fertilizers and animal waste products in human agriculture has greatly influenced the...
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相关实验视频

Updated: May 24, 2025

An Array-based Comparative Genomic Hybridization Platform for Efficient Detection of Copy Number Variations in Fast Neutron-induced Medicago truncatula Mutants
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以铁素为媒介的机制,在玉米中有效利用.

Guannan Jia1, Guojingwei Chen1, Zhaoheng Zhang1

  • 1State Key Laboratory of Plant Environmental Resilience, College of Biological Sciences, Center for Crop Functional Genomics and Molecular Breeding, Frontiers Science Center for Molecular Design Breeding (MOE), China Agricultural University, Beijing, China.

Nature plants
|March 5, 2025
PubMed
概括

研究人员确定了ZmFd4,该基因对玉米中使用效率至关重要. 这一发现增强了酸盐的吸收,提高了谷物产量,特别是在缺乏的条件下.

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Generation of Composite Plants in Medicago truncatula used for Nodulation Assays
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Lignin Down-regulation of Zea mays via dsRNAi and Klason Lignin Analysis
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Lignin Down-regulation of Zea mays via dsRNAi and Klason Lignin Analysis
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科学领域:

  • 植物生物学 植物生物学
  • 遗传学 遗传学 是一个
  • 农业科学 农业科学

背景情况:

  • (N) 对植物生长和作物产量至关重要.
  • 了解玉米 (Zea mays L.) 的N使用效率 (NUE) 对农业生产率至关重要.
  • 酸盐 (NO3-) 是玉米的主要无机N来源.

研究的目的:

  • 确定控制玉米中射酸盐积累的遗传因素.
  • 为了阐明在玉米中利用N的分子机制.
  • 通过基因改造,为改善玉米产量提供见解.

主要方法:

  • 在低酸盐条件下对玉米苗进行全基因组关联研究 (GWAS).
  • 研究了ZmFd4与酸盐减少酶 (ZmNiRs) 的相互作用和局部化.
  • 分析了淘汰赛线,并进行了实地实验,以评估N的利用率和产量.

主要成果:

  • 鉴定出ferredoxin基因ZmFd4作为射击酸盐积累的关键调节者.
  • ZmFd4与质体中的ZmNiR相互作用,影响它们的活性.
  • ZmFd4与ZmFd9形成一个酸盐敏感异构体,调节ZmNiR相互作用.
  • 在N缺乏的情况下,ZmFd4淘汰线显示了提高酸盐同化,酸盐利用率和谷物产量.

结论:

  • ZmFd4在玉米的利用和产量方面发挥着重要作用.
  • ZmFd4和ZmFd9之间的相互作用会影响酸盐同化效率.
  • 这些发现为改善玉米和其他作物的利用率和产量提供了分子洞察力.