Q103: Identify the long day plants: (A). Sugarbeet (B). Tobacco (C).... - Plant Physiology / Crop Physiology - ICAR AIEEA PG 2024 - Plant Biotechnology | Agrigyan

Photoperiodic classification:
Sugarbeet (Beta vulgaris): Obligate/qualitative Long-Day Plant (LDP) requiring long days and cold vernalization for flowering.
Potato (Solanum tuberosum): Functions as a Long-Day Plant (LDP) with respect to floral induction and flowering (though tuberization is favored by short days).
Tobacco (Nicotiana tabacum, cv. Maryland Mammoth): Classical Short-Day Plant (SDP) in which photoperiodism was first discovered by Garner and Allard.
Cotton (Gossypium spp.): Day-Neutral Plant (DNP).