Use of Electrical Conductivity as a Tool for Determining Damage Index of Some Mango Cultivars

Ismail, Omayma M.

doi:10.9734/ijpss/2014/8200

Cited by 7 publications

(5 citation statements)

References 20 publications

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“…This change in climate affects the behavior of fruit trees and their productivity. In 2008, Egypt was exposed to a wave of frost that caused severe damage to mango trees; Hence, there is a need to know which cultivars are resistant to winter cold (Ismail, 2014).…”

Section: Discussionmentioning

confidence: 99%

Impact of Exposure to Low Temperature Degrees in Field Conditions on Leaf Pigments and Chlorophyll Fluorescence in Leaves of Mango Trees

Sayed

Gadallah

El-Yazal

et al. 2020

JHPR

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This experiment was conducted to found the connection between low temperature stress in vivo conditions (ambient-air temperature) and the changes in some physiological and biochemical events (leaf pigments and chlorophyll fluorescence) of mango trees in response to exposure to natural low temperature (cold). To verify this objective, 12 popular commonly mango cultivars (25 years old) which grown in private orchard in Fayoum Governorate, Egypt were selected for this study which carried out during the period from November to March of years; 2012 and 2013. The selected cultivars were: Alphonso, Baladi, Bullock's Heart, Helmand, Hindi Besennara, Mabrouka, Mestekawy, Nabeeh, Oweisi, Spates, Taimour and Zebda. Based on the obtained results, it can be stated that, chlorophyll (a) concentration in the leaves was significantly differed among the cultivars throughout the whole sampling times, in this respect, Helmand one gave the highest one while, and the highest one by sampling times was November one. The concentration of chlorophyll (b) was significant as effected by the effect of cultivars and sampling time recorded the highest value by the cultivar of Spates and December sample, respectively. Total chlorophyll concentration in the leaves reached its peak by the cultivar of Nabeeh and sampling time of December as compared to others. The both of Ewais cultivar and the sample of March showed the highest values of carotenoids concentration in the leaves. The levels of anthocyanin in leaves were significantly differed as affected by the cultivars and sampling times, indicating that the cultivar of Helmand and November sample recorded the highest values of anthocyanin in leaves. The greatest reductions in Fv/Fmratio were recorded at month of November and indicated that the reductions were in the order of Alphonso˃ Mabrouka˃Taimour˃ others. The effect of sampling time, cultivars and their interaction on Fv/Fm were significant, but small between some values of Fv/Fm.

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Section: Discussionmentioning

confidence: 99%

Impact of Exposure to Low Temperature Degrees in Field Conditions on Leaf Pigments and Chlorophyll Fluorescence in Leaves of Mango Trees

Sayed

Gadallah

El-Yazal

et al. 2020

JHPR

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show abstract

“…In 2008, Egypt was exposed to a wave of frost that caused severe damage to mango trees; Hence, there is a need to know which cultivars are resistant to winter cold. 52 As a result of this sensitivity, low temperature produce a range of physiological and metabolic disorders that lead to serious losses. The various dysfunctions that arise under low temperature conditions result in various physical and metabolic changes that are easily scored and which can therefore be used to assess the degree of chilling injury.…”

Section: Discussionmentioning

confidence: 99%

Leaf pigments and chlorophyll fluorescence patterns in leaves of mango as affected by low temperature degrees under field and laboratory conditions

Gadallah¹,

El-Yazal²,

Abdel-Samad³

et al. 2020

HIJ

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Low temperature is a major environmental and evolutionary driver that limits the geographical distribution of plant species worldwide. The relationship between low temperature stress and the response of some different mango cultivars was monitored on some physiological and biochemical events that occur following cold exposure of mango trees leaves. These changes were studied under in vitro (controlled temperatures). However, mango trees were tested to study the changes in leaf pigments and chlorophyll fluorescence of some mango cultivars in response to exposure to low temperature. To verify this objective, 12 popular commonly mango cultivars (25 years old) which grown in private orchard in Fayoum Governorate, Egypt were selected for this study which carried out during the period from November to March of years; 2012 and 2013. The selected cultivars were: Alphonso, Baladi, Bullock's Heart, Helmand, Hindi Besennara, Mabrouka, Mestekawy, Nabeeh, Oweisi, Spates, Taimour and Zebda. Based on the obtained results, it can be stated that in cold storage trial; It was found that chlorophyll (a) level was the highest by Spates cultivar and the lowest one by the cultivar of Mabrouka at storage of 5°C and 10°C as well. Chlorophyll (b) level was the highest by the cultivar of Spates and the minimum one by Ewais cultivar at 5°C of storage while, the cultivars of Spates and Mabrouka given the highest and lowest level at 10°C of storage, respectively. Total chlorophyll values in leaves reached its maximal by the cultivar of Spates and the minimal by Mabrouka at 5°C and 10°C of storage. The obtained results explained that the level of carotenoids reached its peak at 5°C and 10°C of storage by the cultivars of Hindy Besennara and bullock's Heart, respectively. While, the lowest one was recorded by the cultivars of Zebda and Helmand, respectively. The levels of anthocyanin in leaves were significantly differed as affected by the cultivars and storage, indicating that the cultivars of Ewais and Taimour showed the highest levels of anthocyanin and the lowest ones were recorded by the cultivars of Zebda and Alphonso at 5°C and 10°C of storage, respectively. It can be seen that the highest decline in Fv/Fm ratio were given by the cultivar of Balady while, the higher ratio was recorded by Nabeeh cultivar at 5°C of storage. At 10°C of storage, Nabeeh cultivar gave the highest ratio of Fv/Fm and the lowest one was obtained by Mestekawy one. A noticeable decline in Fv/Fm values was observed as storage period (5°C and 10°C) was progressed reaching the minimum level by day 10 of storage.

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“…In 2008, Egypt was exposed to a wave of frost that caused severe damage to mango trees; Hence, there is a need to know which cultivars are resistant to winter cold. 21 As a result of this sensitivity, low temperature produce a range of physiological and metabolic disorders that lead to serious losses. The various dysfunctions that arise under low temperature conditions result in various physical and metabolic changes that are easily scored and which can therefore be used to assess the degree of chilling injury.…”

Section: Discussionmentioning

confidence: 99%

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2019

HIJ

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Use of Electrical Conductivity as a Tool for Determining Damage Index of Some Mango Cultivars

Cited by 7 publications

References 20 publications

Impact of Exposure to Low Temperature Degrees in Field Conditions on Leaf Pigments and Chlorophyll Fluorescence in Leaves of Mango Trees

Impact of Exposure to Low Temperature Degrees in Field Conditions on Leaf Pigments and Chlorophyll Fluorescence in Leaves of Mango Trees

Leaf pigments and chlorophyll fluorescence patterns in leaves of mango as affected by low temperature degrees under field and laboratory conditions

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