responses of tepary bean plant under change in growth condition

Plants adjust physiochemical attributes to maintain sustainable growth under different agricultural practices such as the management of sowing date and planting pattern. the present experiment aimed to investigate the important role of sowing date (sd) and planting pattern (row arrangement) on physiochemical attributes of tepary bean (phaseolus acutifolius l.) as a split-split plot design with three replications during 2017 and 2018. the main plots were two planting patterns (pp1: one-row and pp2: two-row plantation) and sub plots were three sowing dates (early, medium, and late planting, respectively in june 15:sd1, june 30:sd2, and july 15:sd3). based on the results, increased chlorophyll (chl) and carotenoid contents were observed under two-row plantation and medium sowing date. although chl content improved at pp2, carotenoid had no response to planting pattern the greater relative water content (rwc) was observed in plants under sd2, but the increased proline accumulation was reported at sd3. the least catalase and superoxide dismutase aggregations with 19 and 9.3 (umg-1protein) were obtained in plants under two-row plantation and medium sowing date, respectively. photosynthesis pigments had a significant and positive correlation with rwc, but they negatively correlated with proline, cat, and sod. sowing date and planting pattern influenced the microclimate of tepary bean, which affected the physiochemical properties. therefore, physiochemical attributes are recommended to observe the optimal situation of tepary bean under the management of sowing date and planting pattern in arid and semiarid areas.