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Related Concept Videos

The Anatomy of Chloroplasts01:08

The Anatomy of Chloroplasts

Green algae and plants, including green stems and unripe fruit, harbor specialized organelles called chloroplasts to carry out photosynthesis. They coordinate both stages of photosynthesis — the light-dependent reactions and the light-independent reactions. The light-dependent reactions use sunlight to release oxygen and produce chemical energy in the form of ATP and NADPH, and the light-independent reactions capture CO2 and use ATP and NADPH to produce sugar.
Structure of Chloroplasts
A...
Anatomy of Chloroplasts01:07

Anatomy of Chloroplasts

Green algae and plants, including green stems and unripe fruit, harbor chloroplasts—the vital organelles where photosynthesis takes place. In plants, the highest density of chloroplasts is found in the mesophyll cells of leaves.
Key Elements for Plant Nutrition02:35

Key Elements for Plant Nutrition

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 atmosphere, the...
Protein Transport to the Outer Chloroplast Membrane01:11

Protein Transport to the Outer Chloroplast Membrane

Chloroplast outer membrane proteins encoded by the nucleus are synthesized in the cytosol. Soon after synthesis, they bind cytosolic factors such as 14-3-3 protein and the Hsp70 chaperones that keep these precursors in an unfolded state until their translocation.
Two models describe the mechanism of precursor recognition and entry across the outer membrane through the TOC complex. Model 1 suggests the newly synthesized precursor binds to the TOC receptor 159 and forms a complex.
What is Photosynthesis?00:39

What is Photosynthesis?

Photosynthesis is a multipart, biochemical process that occurs in plants as well as in some bacteria. It captures carbon dioxide and solar energy to produce glucose. Glucose stores chemical energy in the form of carbohydrates. The overall biochemical formula of photosynthesis is 6 CO2 + 6 H2O + Light energy → C6H12O6 + 6 O2. Photosynthesis releases oxygen into the atmosphere and is largely responsible for maintaining the Earth’s atmospheric oxygen content.
What is Photosynthesis?01:00

What is Photosynthesis?

All living organisms on Earth are directly or indirectly dependent on photosynthesis. It is the only biological process that can capture energy from sunlight and convert it into chemical energy that every organism can use to power its metabolism. Photosynthesis is also the source of oxygen required by many living organisms.
Types of Organisms Based on their Modes of Nutrition
Broadly, there are two main categories of organisms based on their modes of nutrition — autotrophs and heterotrophs. An...

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Updated: Jun 13, 2026

Assessing Structural Traits in Triticum aestivum and Zea mays for C3 and C4 Photosynthetic Differentiation Using Free-hand and Semi-thin Sections
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Chloroplasts and Plant Sustainability: Key Roles and Emerging Insights.

Nunzia Scotti1, Rachele Tamburino2

  • 1CNR-IBBR, National Research Council of Italy, Institute of Biosciences and BioResources, Via Università 133, 80055 Portici, NA, Italy.

International Journal of Molecular Sciences
|June 12, 2026
PubMed
Summary
This summary is machine-generated.

Chloroplasts coordinate plant responses to environmental stresses. These organelles are key to enhancing crop resilience and agricultural sustainability, especially under climate change.

Keywords:
climate changecropsdefenceplastidsresilience

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Area of Science:

  • Plant Biology
  • Molecular Biology
  • Agricultural Science

Background:

  • Chloroplasts, traditionally known for photosynthesis, are increasingly recognized as central regulators of plant responses to environmental challenges.
  • They possess a semi-autonomous genetic system and engage in complex communication with the nucleus via anterograde and retrograde signaling pathways.
  • Beyond energy conversion, chloroplasts are vital for biosynthesis and dynamically modulate metabolic and redox states in response to environmental cues.

Purpose of the Study:

  • To review current knowledge on chloroplast functions in response to abiotic and biotic stresses.
  • To emphasize the role of chloroplasts in plant resilience, productivity, and agricultural sustainability.
  • To highlight chloroplasts as potential targets for improving crop performance under climate change and pathogen pressure.

Main Methods:

  • Literature review synthesizing current research on chloroplast functions under stress.
  • Analysis of chloroplast structural, metabolic, and redox reprogramming during stress.
  • Examination of chloroplast signaling pathways in integrating immune responses and metabolic regulation.

Main Results:

  • Chloroplasts undergo significant reprogramming (structural, metabolic, redox) to maintain photosynthetic efficiency and homeostasis under abiotic stress.
  • During biotic stress, chloroplasts function as signaling platforms, integrating immune responses with metabolic and redox regulation.
  • Overlapping signaling pathways are differentially regulated to support acclimation or defense mechanisms.

Conclusions:

  • Chloroplasts are crucial for coordinating plant stress responses, maintaining photosynthetic and metabolic efficiency.
  • Their central role in plant productivity makes them promising targets for enhancing crop resilience.
  • Harnessing chloroplast functions can significantly contribute to agricultural sustainability in the face of global environmental changes.