Rising CO₂ and Hidden Hunger: Impacts of Climate Change on Micronutrient Density in Staple Crops
上昇するCO₂と隠れた飢餓：気候変動が主食作物の微量栄養素密度に与える影響 (AI 翻訳)
Patience Awewoli Kwara, Chisom Ejezie, Rita Onyebuchi Ogboh
🤖 gxceed AI 要約
日本語
このレビューは、大気中のCO₂濃度上昇が主要穀物の微量栄養素密度に及ぼす影響を、植物生理学、圃場実験、食事モデルに基づき総合的に検討している。炭水化物の蓄積促進による栄養素希釈や、窒素代謝変化による鉄・亜鉛・タンパク質の低下が一貫して観察され、特に米と小麦で顕著である。モデル試算では、CO₂上昇により世界の鉄・亜鉛欠乏が悪化すると予測され、食料の量と質のギャップが拡大する恐れがある。対策には品種改良、土壌管理、食事多様化、栄養に配慮した政策が求められる。
English
This review synthesizes mechanistic, experimental, and epidemiological evidence on how elevated CO₂ alters micronutrient composition in staple crops. Elevated CO₂ enhances carbohydrate accumulation while reducing iron, zinc, protein, and vitamins, especially in rice and wheat, due to nutrient dilution and altered nitrogen metabolism. Model projections indicate increased global burden of iron and zinc deficiencies by mid-century. Addressing this requires integrated approaches including crop improvement, agronomic management, dietary diversification, and nutrition-sensitive climate policies.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本は多くの主食を輸入に依存しており、CO₂上昇による栄養価低下は国民の微量栄養素摂取に影響を及ぼす可能性がある。食品の品質低下は「量」だけでなく「質」の観点からの食料安全保障政策を促す。また、気候変動適応策として作物の栄養強化や品種改良の重要性が増す。
In the global GX context
Globally, this paper highlights a critical dimension of climate change often overlooked: the nutritional quality of food. It strengthens the case for integrating nutrition into climate adaptation and food system policies, relevant to SDG 2 (Zero Hunger) and the Paris Agreement. The findings also inform international discussions on climate impacts on human health and the need for cross-sectoral responses.
👥 読者別の含意
🔬研究者:Provides a comprehensive synthesis of the CO₂-nutrition linkage, useful for researchers in climate impacts, plant science, and public health nutrition.
🏢実務担当者:Agribusiness and food companies should consider micronutrient declines in sourcing and product development; fortification or breeding strategies may become necessary.
🏛政策担当者:Supports the inclusion of food quality in climate adaptation planning and the design of nutrition-sensitive agricultural policies.
📄 Abstract（原文）
Rising atmospheric carbon dioxide (CO₂) is increasingly recognized as a determinant of crop nutritional quality, with implications that extend beyond yield alone. This review brings together mechanistic, experimental, and epidemiological evidence to examine how elevated CO₂ alters the micronutrient composition of staple crops and what this means for population health. Drawing on plant physiology, field-based enrichment studies, controlled experiments, and dietary modeling, it outlines the pathways through which atmospheric change influences food quality. Elevated CO₂ enhances carbon assimilation and promotes the accumulation of carbohydrates, leading to a relative dilution of other nutrients. At the same time, reduced transpiration and changes in nitrogen metabolism constrain the uptake and incorporation of key nutrients, including iron, zinc, protein, and selected vitamins, particularly in major crops such as rice and wheat. Across different study designs, a consistent pattern emerges, with declines in nutrient density shaped by crop type, genotype, and environmental conditions. For populations that rely heavily on staple foods, these changes translate into lower dietary intake of essential micronutrients. Model-based projections suggest that continued increases in CO₂ could substantially increase the global burden of iron and zinc deficiencies by mid-century. Taken together, the evidence points to a widening gap between food quantity and food quality. Addressing this challenge will require coordinated approaches that link crop improvement, soil and agronomic management, dietary diversification, and nutrition-sensitive policy within broader climate and food system strategies.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.56557/jafsat/2026/v13i310657first seen 2026-06-18 04:43:42
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