Document Type : Original Article
Department of Agronomy and Plant Breeding, Islamic Azad University, Arak Branch, Arak, Iran
Department of agriculture, Islamic Azad University- Arak-Iran
Department of Agronomy and Plant Breeding, Arak Branch, Islamic Azad University, Arak, Iran
Arak branch-Islamic Azad University- Arak-Iran
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 aims to investigate the important role of sowing date (SD) and planting pattern (row arrangement) on physiochemical attributes of tepary bean (Phaseolusacutifolius L.) as a split-split plot designs 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 June 15:SD1, June 30:SD2, and July15:SD3). The results showed increased chlorophyll (Chl) and carotenoid content was 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 aggregation with 19 and 9.3(Umg-1protein) was obtained in plants under two-row plantation and medium sowing date respectively. Photosynthesis pigments represented the significant and positive correlation with RWC, but they negatively correlated with proline, CAT and SOD. Sowing date and planting pattern influence the microclimate of tepary bean, which affect 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.