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#leaf senescence

3 public questions tagged with this topic.

Leaf longevity increases in which mutants?

B fits best: Ethylene insensitive. Keep the Phytohormone ALL basics straight and Ethylene insensitive stands out as the precise answer. Avoid: A) Auxin insensitive; C) GA deficient; D) ABA insensitive. Light and flowering items often hinge on which photoreceptor or day-length rule is in play.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

Cytokinins delay leaf senescence by:

That points to B: Inhibiting chlorophyll degradation. Compared with the other options, Inhibiting chlorophyll degradation is the one that correctly describes the Cytokinin concept. The wrong ones are A) Promoting ABA; C) Increasing ethylene; D) Reducing photosynthesis. If you’re stuck, eliminate anything that contradicts a basic fact you already know for this topic.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.