How phosphorus affect root growth of seedlings?
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Phosphorus levels significantly impact the root growth of seedlings. Research shows that under phosphorus-deficient conditions, seedlings exhibit increased lateral roots, specific root length, branch density, and root length density . Conversely, both phosphorus deficiency and excess inhibit the growth and development of pear seedling rootstock, affecting root growth, photosynthetic rate, and acid phosphatase activity . Additionally, trees adjust their root morphology in response to heterogeneous phosphorus supplies, with roots showing greater biomass and diameter in phosphorus-rich patches compared to phosphorus-poor patches . Furthermore, the response of roots to localized phosphorus supply varies among species, with maize roots proliferating in phosphorus patches while faba bean roots show no response . Overall, phosphorus levels play a crucial role in shaping root architecture and growth in seedlings.
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| Papers (5) | Insight |
|---|---|
| Phosphorus availability, influenced by mycorrhizal associations and Pi starvation, activates specific PHT1 transporters in barley roots, enhancing phosphorus use efficiency and promoting seedling growth. | |
| Phosphorus application locally enhanced maize root growth by increasing root length density, while faba bean showed no response, indicating species-specific differences in seedling stage root responses. | |
| Phosphorus availability influences root morphology, with roots adjusting length and biomass to optimize nutrient absorption. Heterogeneous phosphorus conditions prompt increased root-to-shoot ratio for improved nutrient uptake efficiency in seedlings. | |
| Phosphorus levels significantly impact root growth in pear seedling rootstock, with both deficiency and excess inhibiting growth, as shown by decreased root elongation under both conditions. | |
8 Citations | Phosphorus stress increases lateral roots, root hair length, and specific root length in cotton seedlings, enhancing adaptability to low-phosphorus conditions and influencing root architecture. |
Related Questions
What are the importance of phosphorus in plants nutrients?5 answersPhosphorus is crucial for plant growth and development, playing a vital role in various biochemical processes. It is essential for energy transfer, photosynthesis, cell division, and tissue development. Phosphorus is also involved in the biosynthesis of primary and secondary metabolites, impacting dry matter production, seed yield, and overall biomass. Additionally, phosphorus is indispensable for nitrogen fixation in legumes, influencing nodulation and symbiotic interactions with rhizobia. However, factors like soil pH, organic matter, and other nutrients can limit phosphorus availability for plant uptake, necessitating management practices such as liming, organic amendments, and precise fertilizer application. Understanding phosphorus dynamics in the soil-plant continuum is crucial for developing integrated phosphorus management strategies to enhance plant nutrition and sustainability.
How does the uptake of phosphorus affect crop yield and quality?4 answersThe uptake of phosphorus (P) has a significant impact on crop yield and quality. Excess P uptake by maize can lead to a decrease in grain yield, as demonstrated in the study by Penn et al.. Luxury P consumption beyond the point of maximum grain yield resulted in a decrease in grain content of nitrogen (N), sulfur (S), iron (Fe), copper (Cu), and zinc (Zn), along with a decrease in grain yield. This decrease in translocation of Cu, Zn, and Fe from roots to grain may have limited protein production, as indicated by the decrease in grain N and S content and concentration. On the other hand, Munusamy et al.suggest that sustainable agriculture management facilitated by precision crop assessment can improve phosphate uptake by plants, ensuring better nutrient availability for optimal growth and yield. The meta-analysis by Freiling et al.further supports the effectiveness of different P placement methods, such as band application, in enhancing yield and P uptake in wheat and maize. Overall, understanding and optimizing P uptake is crucial for maximizing crop yield and quality.
What role does phosphorus play in plant growth?5 answersPhosphorus (P) is an essential macronutrient for plant growth and plays a vital role in various plant processes. It is involved in energy transfer, photosynthesis, nutrient movement within the plant, and the transfer of genetic characteristics. However, abiotic stresses such as temperature extremes, drought, and excess soil moisture can reduce the transport of nutrients from the roots to the shoots, leading to a decline in crop productivity. External application of P has been identified as a promising strategy to mitigate the impact of these stresses and improve stress tolerance in crops. Phosphorus availability in soils is often limited, and the poor use efficiency of phosphatic fertilizers further exacerbates this challenge. Phosphate solubilizing microorganisms (PSM) have been identified as potential agents for solubilizing and mobilizing insoluble phosphates in arid soils, thereby enhancing plant nutrition. Plants modulate complex responses to fluctuating P levels through global transcriptional regulatory networks, although the specific chromatin-level mechanisms involved in regulating P homeostasis are not yet understood. Phosphorus also plays a crucial role in mitigating abiotic stresses such as drought, salinity, heavy metal, heat, and acid stresses, and its management in agricultural lands can help plants survive under these conditions. Legume crops, in particular, require higher levels of P fertility for optimal growth and yield, and the application of phosphorus has been shown to increase various growth parameters and yield in legume crops.
Why is phosphorus important for soil health?5 answersPhosphorus (P) is important for soil health because it is essential for the growth of agricultural crops and plays a crucial role in maintaining soil fertility and nutrient availability. It is a key component of plant DNA, RNA, and ATP, and is involved in various metabolic processes. Phosphorus availability in soil is influenced by both abiotic processes, such as sorption/desorption and precipitation/dissolution, and biological processes, including microbial mineralization/immobilization and plant uptake. However, anthropic actions have disrupted the natural P cycle, leading to uneven P distribution in global soils and potential imbalances in P-cycling and food production. Efficient management of soil P is necessary to provide an adequate food supply while mitigating environmental impacts on water quality. Strategies to manage soil P include preventing excessive buildup, improving P recovery from wastes, limiting losses to water systems, and implementing soil conservation practices.
How potassium and magnesium can interfere in phosphorus in plants?5 answersPotassium and magnesium play important roles in the uptake and release of phosphorus in plants. In the context of Enhanced Biological Phosphorus Removal (EBPR) processes, potassium and magnesium were found to be co-transported with phosphorus into and out of bacterial cells. High activity ratio between potassium and calcium induced calcium deficiency, resulting in restricted root functioning and decreased nutrient uptake rates and plant growth. Magnesium was found to suppress the uptake of potassium and calcium, but had no effect on phosphorus uptake. In sunflower plants, potassium deficiency led to the replacement of potassium with magnesium and calcium. In the context of wastewater treatment, potassium and magnesium were soluble with phosphate in the anaerobic phase, but accumulated again during the aerobic/anoxic phase. Calcium, however, was not co-transported with phosphorus during the release and uptake processes.
How does calcium affect root growth in plants?5 answersCalcium plays a crucial role in root growth in plants. It has been observed that calcium promotes longitudinal growth in roots, while strontium inhibits this growth. The effects of calcium on root growth are primarily related to the regulation of cell elongation. Calcium ions have been shown to maintain spatial control of membrane trafficking and the cytoskeleton, which are essential for localized cell expansion at the growing tip of roots. Additionally, calcium signaling interacts with other components involved in root growth, such as monomeric G-proteins, phospholipases, and the cytoskeleton, to facilitate the localization of growth. Overall, calcium is a crucial regulator of root growth and development in plants, influencing various processes involved in root elongation and expansion.