The C₄ (Hatch and Slack) pathwayC₄ (हैच और स्लैक) पथ

NCERT Fig 11.9 (a) · interactive diagram

Parts and their functions

• Mesophyll cell (पर्णमध्योतक कोशिका) — Has PEPcase, lacks RuBisCO.
• Bundle sheath cell (पूलाच्छद कोशिका) — Rich in RuBisCO, lacks PEPcase.
• Primary CO₂ fixation (प्राथमिक CO₂ स्थिरीकरण) — PEP + CO₂ → OAA by PEP carboxylase.
• C₄ acid moves (C₄ अम्ल का स्थानांतरण) — OAA forms malic or aspartic acid, transported to the bundle sheath.
• Decarboxylation (विकार्बोक्सिलीकरण) — C₄ acid broken down to release CO₂ and a C₃ molecule.
• RuBisCO here only (RuBisCO केवल यहाँ) — Released CO₂ enters the Calvin cycle in the bundle sheath.
• C₃ acid returns (C₃ अम्ल की वापसी) — Pyruvic acid goes back to the mesophyll and is converted to PEP.

Original diagram drawn by Simple Learning Hub, based on NCERT Fig 11.9 (a). Report a mistake