calcium-nutrition
Calcium nutrition refers to the study of how plants acquire, transport, and utilize calcium as an essential macronutrient for growth and development. Calcium plays a critical structural role in cell walls and membranes, and also acts as a key signaling molecule that mediates plant responses to environmental stresses and developmental cues. Understanding calcium nutrition is vital for improving crop quality, preventing calcium-deficiency disorders, and elucidating the molecular pathways that govern nutrient sensing in plants.
PubMed · 2026-04-08
Scientists discovered that calcium-starved plants trigger their own immune systems to attack themselves, stunting leaf growth. The culprit is a molecular traffic jam: without enough calcium, a key enzyme fails, a waste molecule piles up, cell walls weaken, and the plant misfires an immune alarm — but fixing the enzyme restores normal growth.
Calcium deficiency reduces the abundance of the AVP1 enzyme, causing inorganic pyrophosphate to accumulate in the cytosol and disrupt cellulose synthesis in plant cell walls.
Impaired cell walls trigger salicylic acid-driven autoimmune signaling — the plant's own immune system — which actively suppresses new leaf growth.
Genetically enhancing pyrophosphate breakdown improved low-calcium growth tolerance, and this entire mechanism was also confirmed to operate in tomato, not just the model plant.
