S. Pourmoradi; A. Aalami; M. Esfahani
Abstract
To evaluate the percentage and degree of polymerization and yield of inulin, and also root fresh yield of 13 native accessions and two imported cultivars of chicory (Cichorium intybus L.), an experiment was conducted using randomized complete block design with three replications in Khoshkedaran Research ...
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To evaluate the percentage and degree of polymerization and yield of inulin, and also root fresh yield of 13 native accessions and two imported cultivars of chicory (Cichorium intybus L.), an experiment was conducted using randomized complete block design with three replications in Khoshkedaran Research Station of Mazandaran province, Iran, in three consecutive years (2016-2018). The roots were harvested at the end of the rosette stage in the second year of cultivation, then weighed and relevant calculations were performed. Samples were extracted by using aqueous extraction method, and their total sugar content and reducing sugar and the percentage and degree of polymerization of inulin were calculated. Means comparison showed that accessions "Rasht" and "Chamestan" and imported cultivar "Selenite" had the highest percentage of inulin (15.8, 13.9, and 14.3%, respectively) among the chicory genotypes. Findings showed that cultivar "Selenite" and accession "Tonekabon" were more superior to other genotypes in terms of fresh root yield and inulin and ranked first (35.458 t ha-1 fresh root and 2818.99 kg ha-1 inulin yield) and second (12.692 t ha-1 fresh root and 807.5 kg ha-1 inulin yield), respectively. In addition, "Selenite" and "Tonekabon" had good stability in terms of percentage and degree of inulin polymerization in two years of research and were found to be more suitable for the western region of Mazandaran province than other genotypes.
S. Taherniaye Mozhdehi; M. Esfahani; D. Bakhshi; B. Rabiei
Abstract
In order to investigate the effects of planting date and plant density on phyllochron and active integradients of milk thistle (Silybum marianum L.), two field factorial experiments based on a randomized complete blocks design were carried out in two sites (Rudbar and Rasht) in Guilan province, Iran, ...
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In order to investigate the effects of planting date and plant density on phyllochron and active integradients of milk thistle (Silybum marianum L.), two field factorial experiments based on a randomized complete blocks design were carried out in two sites (Rudbar and Rasht) in Guilan province, Iran, with three planting dates (Sep., 23; Oct., 12 and Nov., 1) and three plant densities (4, 6 and 8 plant.m-2) during 2008-2009. In this experiment it was observed that phyllochron was affected by planting date and plant density and with delay in planting date (from Sep., 23 to Nov., 1), phyllochron decreased and the rate of leaf appearance increased. The highest rate of leaf appearance was obtained in Oct., 12 (8.6 and 7.7 days in Rasht and Rudbar, respectively). Phyllochron increased with increasing plant density and the lowest phyllochron and, in other words, the maximum rate of leaf appearance was obtained in Rudbar site at a plant density of 4 plant.m-2 (7.7 days). The effect of planting date on silibin content of seeds in Rudbar site was significant (maximum 1.872 mg.g.-1DW) but it wasn’t significant on silibin content in Rasht. Effect of plant density was not significant on silibin yield.ha-1 and silibin content at both sites. Results of combined analysis showed that the effect of planting date on silibin and interaction effect of site and planting date on silibin yield.ha-1 was significant. The maximum silibin yield (1.31 kg.ha-1) was obtained from Sep., 23 in Rudbar site. According to the results of this experiment, although a delay in planting enhanced the rate of leaf appearance and increased plant's readiness to over-wintering, but it had no increasing effect on silibin content of seeds.
