Response of tobacco (Nicotiana tabacum L.) to varying durations of water stress at different growth stages
1985
Baguinon, V.D. | Pacardo, E.P.
Leaf area was affected by the different duration of water stress imposed at various growth stages. Marked reduction in leaf area was most profound at 25 DAT at all levels of water stress. No significant effect on leaf area was observed when the plants were stressed at 45 DAT. Plant height and flower emergence were severely affected when plant was subjected to more than 16 days of water stress (DWS) regardless of growth stage. Relative water content (RWC) and transpiration rate generally decreased with progressing stress. Stomatal density both at the deaxial and adaxial leaf surfaces decreased with the stage when stress was imposed while stomatal density at the abaxial surface increased beyond 4 days of stress. Reduction in total dry matter yield was noted in all stress durations but was most pronounced at 25 DAT. Nicotine generally increase while reduce sugar decreased with various levels of water and stress at all growth stages
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