How does nitrogen deficiency affect the growth and development of plants, particularly in relation to older leaves?
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Nitrogen deficiency significantly impacts plant growth and development, particularly in older leaves. Symptoms of nitrogen deficiency include chlorosis, slow growth, and reduced yield, visible on older leaves . Under nitrogen deficiency, plants undergo leaf senescence to remobilize nitrogen from older leaves to sustain growth. High-N sensitive plants like P. notoginseng exhibit reduced leaf morpho-physiological traits and photosynthetic performance under nitrogen deficiency, affecting photosynthetic rate and efficiency. Precision agriculture emphasizes the crucial role of nitrogen in crop phenotype, quality, and yield, highlighting the necessity of nitrogen fertilizer application for optimal growth. Detecting nitrogen deficiency early through techniques like deep learning can aid in mitigating nutrient deficiency-related plant diseases and optimizing nitrogen management for improved agricultural output.
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| Papers (5) | Insight |
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| Nitrogen deficiency suppresses leaf growth, reduces photosynthetic capacity, and alters leaf morpho-physiological traits, impacting older leaves by decreasing photosynthetic efficiency and potentially damaging photosystem II reaction centers. | |
| Nitrogen deficiency triggers leaf senescence in plants, leading to yellowing of older leaves due to protein and chlorophyll degradation, enabling nitrogen remobilization to support growth in younger tissues. | |
| Nitrogen deficiency in plants affects growth by causing chlorosis in older leaves due to reduced chlorophyll synthesis, impacting plant development and overall health. | |
01 Jan 2023 | Nitrogen deficiency impacts plant growth, affecting older leaves first. It influences crop quality, yield, and disease susceptibility, emphasizing the importance of precise nitrogen management for optimal agricultural outcomes. |
| Nitrogen deficiency in plants leads to slow growth, stunted appearance, lower yield, and primarily affects older leaves, showing visible symptoms such as chlorosis and necrosis. |
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What are the effects of nitrogen deficiency?4 answersNitrogen deficiency has various effects on plants. In rice seedlings, reducing nitrogen levels led to increased malate content in leaves and roots, as well as increased citrate and isocitrate content in leaves. In tea plants, nitrogen deficiency resulted in decreased N content, dry weight, chlorophyll content, and the activities of nitrogen metabolism-related enzymes, while increasing the content of total flavonoids and polyphenols in leaves. Soybean roots showed a shift in bacterial composition, with an enrichment of Methylobacteriaceae under nitrogen deficiency stress. Cyanobacteria exhibited changes in pigment composition but no significant changes in lipid and fatty acid composition under nitrogen deficiency. In soybean, nitrogen deficiency affected the growth and development of the plant, as well as the formation of the soybean-Bradyrhizobium symbiotic complex.
How does nitrogen affect the growth of plants?5 answersNitrogen is an essential nutrient for plant growth and development. It is required for the formation of DNA, proteins, and chlorophyll, which are vital for plant functions. Nitrogen deficiency can lead to slow growth, stunted appearance, and lower yield in plants, with symptoms most visible on older leaves. Excess nitrogen, on the other hand, can be toxic to plants and harm both the soil and the plants themselves. Nitrogen metabolites, such as NO3-, NH4+, tryptophan, and NO, have been found to affect auxin content and signaling in plants, influencing various growth processes. Nitrogen also plays a role in photosynthesis, as it is a component of proteins involved in photochemical and biosynthetic reactions. Additionally, nitrogen assimilation is a complex process that involves the conversion of inorganic nitrogen into organic forms, such as amino acids, which are essential for plant metabolism.
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Role of nitrogen in leaf length of leaf vegetable?5 answersNitrogen plays a significant role in the length of leaves in leaf vegetables. The rate of leaf expansion and the mature leaf area increase with increasing nitrogen application rate. Additionally, nitrogen fertilizer can directly affect the growth of a plant's organs, including leaves. Furthermore, nitrogen metabolism is closely coordinated with other metabolic pathways, and mitochondria, which are involved in nitrogen assimilation, play a central role in this process. Nitrogen is also one of the main nutritional elements that contribute to the increase in leaf area and physiological processes in plants. Therefore, a proper balance of nitrogen in leaf vegetables can lead to better growth and development, including the length of leaves.
How N deficiency regulates and reduces tillering?3 answersN deficiency regulates and reduces tillering by affecting the expression of certain genes involved in tiller development. It has been found that adding inhibitors can significantly reduce N2O emissions from wheat and maize fields by 36% to 46%. Additionally, reducing nitrogen application by up to 30% can decrease N2O emissions by 10% to 18% without affecting crop yield. The use of controlled-release fertilizers and straw incorporation can also significantly reduce N2O emissions from wheat fields. However, the effect on maize fields is not significant. These findings suggest that implementing these N deficiency management strategies can effectively reduce N2O emissions and contribute to overall greenhouse gas reduction in agricultural fields.