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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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Adaptations that Reduce Water Loss01:57

Adaptations that Reduce Water Loss

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Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
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Light Acquisition02:16

Light Acquisition

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In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
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Regulation of Transpiration by Stomata02:04

Regulation of Transpiration by Stomata

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During photosynthesis, plants acquire the necessary carbon dioxide and release the produced oxygen back into the atmosphere. Openings in the epidermis of plant leaves is the site of this exchange of gasses. A single opening is called a stoma—derived from the Greek word for “mouth.” Stomata open and close in response to a variety of environmental cues.
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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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Trophic Efficiency00:46

Trophic Efficiency

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Trophic level transfer efficiency (TLTE) is a measure of the total energy transfer from one trophic level to the next. Due to extensive energy loss as metabolic heat, an average of only 10% of the original energy obtained is passed on to the next level. This pattern of energy loss severely limits the possible number of trophic levels in a food chain.
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Related Experiment Video

Updated: Mar 6, 2026

Microplot Design and Plant and Soil Sample Preparation for 15Nitrogen Analysis
08:44

Microplot Design and Plant and Soil Sample Preparation for 15Nitrogen Analysis

Published on: May 10, 2020

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Foliar nutrient dynamics and nutrient use efficiency in Cornus florida.

Jane A Kost1, R E J Boerner1

  • 1Department of Botany, Ohio State University, 1735 Neil Avenue, 43210, Columbus, OH, USA.

Oecologia
|March 18, 2017
PubMed
Summary
This summary is machine-generated.

Flowering dogwood growth and nutrient use efficiency varied with soil moisture and fertility. Soil moisture most impacted growth and nitrogen use efficiency, especially during dry periods.

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Area of Science:

  • Forest Ecology
  • Plant Physiology
  • Nutrient Cycling

Background:

  • Understanding how environmental factors like soil moisture and nutrient availability affect tree growth and nutrient use is crucial for forest management.
  • Cornus florida (flowering dogwood) is a common understory tree species, making it a good indicator for forest health.
  • Nutrient use efficiency (NUE) is a key metric for assessing plant adaptation to varying resource conditions.

Purpose of the Study:

  • To investigate the impact of soil moisture and nutrient availability on the growth rates and seasonal nutrient dynamics (nitrogen, phosphorus, calcium) of flowering dogwood.
  • To quantify nutrient use efficiency, resorption, growth efficiency, and nutrient losses in flowering dogwood across different soil conditions.
  • To determine which factors (soil moisture or nutrient availability) have a greater influence on growth and NUE.

Main Methods:

  • Field study across three forest stands with differing soil moisture and nutrient levels.
  • Measurement of foliar nutrient concentrations (N, P, Ca) and seasonal changes.
  • Calculation of various nutrient use efficiency metrics, including leaf mass per unit nutrient, resorption rates, and growth efficiency.
  • Dimension analysis used to determine relative growth rates during a drought year and over a 5-year period.

Main Results:

  • Relative growth rates were highest on the moistest site during a drought year, but on the most fertile site over a 5-year average.
  • Nitrogen use efficiency was highest on the moistest site, while phosphorus and calcium use efficiencies were generally highest on the least fertile site.
  • Soil moisture appeared to have a stronger effect on growth and nitrogen use efficiency than on phosphorus or calcium use, particularly during the dry year.

Conclusions:

  • Soil moisture is a critical factor influencing flowering dogwood growth and nitrogen use efficiency, especially under drought conditions.
  • The relative importance of soil moisture versus nutrient availability can shift depending on the specific nutrient and environmental conditions.
  • These findings highlight the complex interactions between water and nutrient dynamics in forest ecosystems and their impact on tree performance.