Combined effects of ethephon and mepiquat chloride on late blooming, fruit set, and phytochemical characteristics of Black Diamond plum

Abstract

Plums belong to the subgenus Prunophora within the genus Prunus and include species originating from Europe, Asia, the Far East (Japanese plums), and North America such as Prunus cerasifera, Prunus domestica, and Prunus salicina. Plum plants grow in the wide climatic conditions of the northern and southern hemispheres. Turkey is the gene center of some plum species and has an important place in plum growing (Celik et al., 2017).Temperature increases due to climate change result in the early blooming of fruit trees (Funes et al., 2016;Szabo et al., 2017), while duration of the effects of late spring frosts and related damage increase (Rahimi et al., 2018). This threatens fruit trees, particularly stone fruit and nuts, which bloom early and have short blooming periods (Inouye, 2008;Mertoğlu and Evrenosoğlu, 2017). To help combat this issue, changes among different phenological phases in frost resistance were investigated. The sensitivity of current genetic resources to late spring frost were determined previously (

Effects of the fruiting period and growing seasons on market quality in goji berry (Lycium barbarum L.)

“…In this context, vitamin C, which has a positive correlation with titratable acidity, was detected to have a high negative correlation with pH (r = -0.81***). Obtained results were found compatible with the literature (Vieira et al, 2009;Mertoglu and Evrenosoglu, 2019).…”

“…Ascorbic acid (vitamin C) has an acidic character and increases as the acidity of the environment (Mertoglu and Evrenosoglu, 2019). Therefore, strong positive relationship between vitamin C and titratable acidity was found with r = 0.88*** correlation coefficient (Table 3) in agreement with I Forcada et al (2014).…”

“…Based upon the obtained results, it was noted that the decrease in fruit weight, fruit length and fruit width up to 15.9%, 18.3% and 6%, respectively were directly associated with yield ( Figure 1). Increased crop load was found to cause a decrease in physical properties due to sink competition among fruits and these results were in agreement with Galindo et al (2015) and Mertoglu et al (2019a). The effect of ecological factors on these properties is also important.…”

“…Thus, the lower content of vitamin C than other antioxidant compounds may have caused this situation. A positive relationship between vitamin C and antioxidant activity in some other species such as apple and pear was noted to have lower phenolic compounds (Vieira et al, 2009;Mertoglu and Evrenosoglu, 2019). These situations suggest that breeders prioritise phenolic compounds for the development of antioxidant activityrich cultivars.…”

“…But the statistical significance was determined between yield and fruit size (-0.43*) and fruit weight (-0.40*) ( Table 3). Increase in fruit set was negatively affected fruit sizes and weight due to carbohydrate competition among fruits (Reig et al, 2016;Mertoglu et al, 2019a).…”