Q.1
‘Which plant hormone reports the delay in senescence?
- Richmond-Lang Effect (1957): Cytokinins significantly delay leaf senescence and retard chlorophyll degradation by maintaining protein synthesis, suppressing protease activity, and actively mobilizing nutrients to cytokinin-treated tissues.
- Roles of Other Hormones: Auxins promote apical dominance and rooting; gibberellins promote stem elongation and seed germination; ethylene and abscisic acid promote senescence and abscission.
Correct option: (3) Cytokinins
Explanation not matching this question?
क्या व्याख्या इस प्रश्न से मेल नहीं खा रही?
Report
Want to practice this paper in exam conditions?
क्या आप परीक्षा जैसे माहौल में अभ्यास करना चाहते हैं?
Test yourself in 5-question batch format with timer and hidden answers.
5-प्रश्नों के बैच फॉर्मैट, टाइमर और छिपे उत्तरों के साथ खुद को परखें।
Start Practice Mode →
प्रैक्टिस टेस्ट मोड शुरू करें →