In a phosphorus-deficient plant, purple/anthocyanin pigmentation accumulates in older leaves. Which of the following correctly explains the biochemical mechanism linking phosphorus deficiency to anthocyanin accumulation?

Question

Botany · Plant Biochemistry & Mineral Nutrition

Verified Solution4 OptionsUpdated: October 2026👁️1 View

Share:

Correct answer

Low phosphate increases cytosolic sugar concentrations, which upregulate MYB transcription factors, activating the anthocyanin biosynthesis pathway

Save this question and verified answer as a clean study sheet with live clickable link.

👥

Challenge your peer aspirants on WhatsApp or Telegram to solve this question!

Online Test Series

Practice full-length mock tests with real exam timers, instant score analysis, and all-India ranking.

Chapter Practice

Want more practice questions on Plant Biochemistry & Mineral Nutrition?

Solve complete topic-wise tests with detailed solutions on GkGet.

Recommended practice questions in Botany · Plant Biochemistry & Mineral Nutrition

Which of the following territories was annexed by Lord Dalhousie under the pretext of misgovernance, and not directly through the Doctrine of Lapse?

What was the primary stated reason for the Partition of Bengal in 1905 by Lord Curzon?

Answer 1

More than one of the above

Answer 2

Phosphate deficiency suppresses RuBisCO activity, routing excess carbon from the Calvin cycle into the flavonoid pathway

Answer 3

Phosphorus deficiency inhibits ATP synthesis, causing a redox imbalance that directly converts chlorophyll precursors to anthocyanins

Answer 4

Low phosphate increases cytosolic sugar concentrations, which upregulate MYB transcription factors, activating the anthocyanin biosynthesis pathway

Related Practice Questions