Plant Productions

The Effect of Volck Mineral Oil Spraying on Flowering and Biochemical Characteristics of Two Olive Cultivars under Ahvaz Condition

Sara Davoodi; Shohreh Zivdar; Esmaeil Khaleghi

Volume 45, Issue 1 , May 2022, , Pages 41-52

https://doi.org/10.22055/ppd.2021.34536.1933

Abstract

IntroductionOlive (Olea europaea L.) is an evergreen tree and one of the most important products of the horticultural section in Iran due to high nutritional value of its oil and fruits. ... Read More IntroductionOlive (Olea europaea L.) is an evergreen tree and one of the most important products of the horticultural section in Iran due to high nutritional value of its oil and fruits. Adaptation of olive cultivars to the climatic conditions of different regions are not the same. The results of studies showed that special cultivars are recommended for each region. In tropical and subtropical climates with mild winter such as Ahvaz, the chilling requirement of olive trees is not completed. This condition has led to poor and insufficient flowering in some olive cultivars. Mineral oils, including volck oil are one of the most beneficial treatments to complete chilling requirement and bud break in fruit trees. The aim of this study was to investigate the response of two olive cultivars (Manzanilla and khaziri) to the application of volck mineral oil and studying their flowering and biochemical characteristics in Ahvaz condition. Materials and MethodsIn this experiment, the effect of volck mineral oil spraying [control (water spray), 1, 3, 5 %] on two olive cultivars were investigated. The experimental design was split plot arranged in complete block design with four replications. Measured traits included flowering characteristics such as the number of inflorescences in the branch, flowers in inflorescence, complete flowers, flowering days after treatments, percentage of flower fall, fresh and dry weight of flower and inflorescence. Biochemical properties such as bud carbohydrates and ABA, leaf proline and chlorophyll were measured. Results and DiscussionThe results showed that foliar application of 3 and 5 % volck oil caused flowering (31.8 and 28.7 days after treatment, respectively) in Manzanilla cultivar. Bud carbohydrate content increased significantly after tree spraying with volck oil in all of three concentrations. The highest content of bud carbohydrates (78.68 mg/g) was obtained in khaziri when treated with 3% volck oil. The use of volck oil was effective in increasing the ABA concentration in Manzanilla cultivar and its effect was as 3 and 5% volck oil (83.1 and 105.4 µg/g, respectively). The amount of proline in both cultivars increased until 60 days after applying three concentrations of volck oil. The levels of chlorophyll a, chlorophyll b and total chlorophyll increased until 30 days after treatment and then were decreased. Volck oil (3%) can be used for flowering of Manzanilla cultivar in climatic conditions of Ahvaz. Based on the obtained results, it seems that the effect of volck oil on flowering and biochemical traits depends on the type and concentration of mineral oil and type of the cultivar. In the present study, flowering occurred when Manzanilla cultivar treated with mineral volck oil (3 and 5%) and the flowering traits were improved at 3% oil more than other treatments. ConclusionAccording to the obtained results, olive cultivars show different reactions to the use of Volck oil, and Volck oil with a concentration of 3% can be used for the flowering of Manzanilla cultivar in the weather conditions of Ahvaz.

Investigation on physiological, morphological and biochemical parameters associated with the drought tolerance in four edible fig and two capri fig cultivars

M. Sajedi; M. Esna-Ashari; M. Jafari; E. Aslmoshtaghi

Volume 40, Issue 3 , December 2017, , Pages 101-112

https://doi.org/10.22055/ppd.2017.18347.1354

Abstract

Abstract Background and Objectives Plant responses to water deprivation are usually monitored through selected parameters which have been proven to be good indicators of drought in ... Read More Abstract Background and Objectives Plant responses to water deprivation are usually monitored through selected parameters which have been proven to be good indicators of drought in different studies. Some of the most important standards for evaluating plants under drought stress are measurements of physiological, morphological and biochemical parameters. These parameters have been found to generally reflect drought adaptation and could be used to select drought-tolerant species suitable to cultivate in dry and/or semi-dried lands. In this study, the effect of drought stress on some above-mentioned parameters in six fig cultivars including Sabz, Siah, Siahe Dorosht, Shah Anjir, Bare Veil and Bare poozdombali was investigated through a two-year experiment. Materials and methods The study was conducted in a factorial experiment based on a complete randomized design with four replications and three drought stress levels including field capacity as the control and 50 and 25% of field capacity as mild and severe stress, respectively. Results The highest amount of reduction in the above-mentioned parameters was observed under severe stress showing significant differences with the control and mild stress. The highest amount of relative water content associated with Sabz and Siah Dorosht cultivars and the greatest level of electrolyte leakage belonged to Siah cultivar. Chlorophyll reduction in Sabz was higher than the others and the least was observed in Siah Dorosht. The greatest proline accumulation was related to Bare Veil and the highest carbohydrate accumulation belonged to Bare Veil and Siah cultivars. The highest amount of protein reduction was also observed in Siah and Siah Dorosht without a significant difference. Maximum increase in the amount of potassium and sodium was observed in Siah Dorosht cultivar. Discussion Results indicated that, Siah and Bare Veil cultivars had approximately similar physiological and biochemical characteristics, so they evaluated as drought tolerant cultivars. It seems that fig plant employs a combination of mechanisms to overcome drought stress. Osmotic regulation is the active regulation of the osmotic pressure of the fig plant tissue’s fluid to maintain the homeostasis of the tissue’s water content; that is, it maintains the fluid balance and the concentration of electrolytes (salts in solution) to keep the fluids from becoming too diluted or too concentrated. In this study, the two above-mentioned drought-tolerant fig cultivars synthesized considerable amounts of proteins, carbohydrates and proline to regulate their tissues osmotic pressure resulting in better growth under drought stress.

Seasonal changes of electrolyte leakage, carbohydrate contents and Re-growth in four cultivars of grape vine (Vitis vinifera l.) cuttings, under freezing stress

H. Araghi; A. Tehranifar; B. Abedi; M. Shoor

Volume 37, Issue 2 , September 2014, , Pages 49-61

Abstract

Grapes are one of the temperate fruit crops most frequently damaged by freezing temperatures. An investigation was carried out to evaluate the effect of freezing temperatures during ... Read More

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Keywords = Carbohydrate

The Effect of Volck Mineral Oil Spraying on Flowering and Biochemical Characteristics of Two Olive Cultivars under Ahvaz Condition

Abstract

Investigation on physiological, morphological and biochemical parameters associated with the drought tolerance in four edible fig and two capri fig cultivars

Abstract

Seasonal changes of electrolyte leakage, carbohydrate contents and Re-growth in four cultivars of grape vine (Vitis vinifera l.) cuttings, under freezing stress

Abstract