Physiological and biochemical response to higher temperature stress in hot pepper (Capsicum annuum L.)

Ghai, Navita; Kaur, Jaspreet; Jindal, S. K.; Dhaliwal, M. S.; Pahwa, Kanchan

doi:10.31018/jans.v8i3.930

Cited by 17 publications

(10 citation statements)

References 24 publications

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“…In cucumber (Cucumis sativus L.) or watermelon (Citrulus lanatus L.), temepratures above 35 • C caused a reduction in flowers and sugar content [113]. In hot pepper, temperatures of 38 • C caused a reduction in flowers and fruits number [114], while temperatures of 40 • C altered the size of the bulbs and increased the sulfur content in onion [115,116]. In tomato plants, tempeartures above 25 • C reduced the number of fruits and flowers, the content of lycopene and carotene and caused fruit discoloration [117].…”

Section: Implications Of Heat For Nutritional and Functional Quality ...mentioning

confidence: 99%

Response and Defence Mechanisms of Vegetable Crops against Drought, Heat and Salinity Stress

2021

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Environmental pollution, increasing CO2 atmospheric levels and the greenhouse effect are closely associated with the ongoing climate change and the extreme climatic events we are witnessing all over the Earth. Drought, high temperature and salinity are among the main environmental stresses that negatively affect the yield of numerous crops, challenging the world food safety. These effects are more profound in vegetable crops which are generally more susceptible to climate change than field or tree crops. The response to single or combined environmental stressors involves various changes in plant morphology and physiology or in molecular processes. Knowing the mechanisms behind these responses may help towards the creation of more tolerant genotypes in the long-term. However, the imediacy of the problem requires urgently short-term measures such as the use of eco-sustainable agricultural practices which can alleviate the negative effects of environmental pollution and allow vegetable crops to adapt to adverse climatic conditions. In this review, the main abiotic stressors were examined, namely drought, heat and salinity stress, focusing on the mechanisms involved in the most common vegetable crops responses. Moreover, the use of eco-sustainable cultural techniques, such as biostimulants, grafting and genomic sequencing techniques, to increase the quality of tomato crop under adverse environmental conditions are also presented.

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Section: Implications Of Heat For Nutritional and Functional Quality ...mentioning

confidence: 99%

Response and Defence Mechanisms of Vegetable Crops against Drought, Heat and Salinity Stress

2021

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“…In hot pepper, the temperature more than 30 °C not only significantly reduces the pollen viability, and fruit set 9 , 10 and yield 11 , 12 , but induces the abscission of floral buds, flowers and immature fruits 11 , 13 . Various hot pepper accessions with diverse genetic backgrounds significantly differ in response to heat stress 14 .…”

Section: Introductionmentioning

confidence: 99%

Heat-tolerant hot pepper exhibits constant photosynthesis via increased transpiration rate, high proline content and fast recovery in heat stress condition

Rajametov

Yang

Cho

et al. 2021

Sci Rep

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Understanding the mechanism for heat tolerance is important for the hot pepper breeding program to develop heat-tolerant cultivars in changing climate. This study was conducted to investigate physiological and biochemical parameters related to heat tolerance and to determine leaf heat damage levels critical for selecting heat-tolerant genotypes. Seedlings of two commercial cultivars, heat-tolerant ‘NW Bigarim’ (NB) and susceptible ‘Chyung Yang’ (CY), were grown in 42 °C for ten days. Photosynthesis, electrolyte conductivity, proline content were measured among seedlings during heat treatment. Photosynthetic rate was significantly reduced in ‘CY’ but not in ‘NB’ seedlings in 42 °C. Stomatal conductivity and transpiration rate was significantly higher in ‘NB’ than ‘CY’. Proline content was also significantly higher in ‘NB’. After heat treatment, leaf heat damages were determined as 0, 25, 50 and 75% and plants with different leaf heat damages were moved to a glasshouse (30–32/22–24 °C in day/night). The growth and developmental parameters were investigated until 70 days. ‘NB’ was significantly affected by leaf heat damages only in fruit yield while ‘CY’ was in fruit set, number and yield. ‘NB’ showed fast recovery after heat stress compared to ‘CY’. These results suggest that constant photosynthetic rate via increased transpiration rate as well as high proline content in heat stress condition confer faster recovery from heat damage of heat-tolerant cultivars in seedlings stages.

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“…Proline played a role in mitigating the deleterious effects (Nawaz et al, 2010). Ghai et al (2016) in their studies indicated that heat stress greatly reduced the chlorophyll contents values in plants. Transpiration rate increased in response to heat stress (Cui et al, 2006) and showed recovery upon exogenous proline application.…”

Section: Discussionmentioning

confidence: 98%

Role of Proline in Mitigating the Deleterious Effects of Heat Stress in Chillies

Akram

Ayyub

Shahzad

et al. 2021

Contemporary Agriculture

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Summary Chilli is a spicy crop which belongs to family Solanaceae. As a vegetable crop, it is considered as one of the major cultivated crops in the world seriously affected by the climatic changes, including elevation in temperature. Therefore, in this research various morpho-physiological characteristics of chilli were studied for heat tolerance under the influence of exogenous application of proline. This research was carried out in a growth room of the Institute of Horticultural Sciences, University of Agriculture, Faisalabad, Pakistan. Four chilli genotypes were evaluated under the applied conditions. Seeds were grown in plastic pots. Heat stress (40/32 ºC day and night temperature) was applied 30 days after the emergence. Foliar spray of proline (0, 5 and 10 mM) was applied during heat stress, and after 7 days of stress the plants were harvested. The results revealed that the inhibition of chilli growth by heat stress was successfully mediated by proline application. Morphological attributes such as the number of leaves per plant, root and shoot length, plant fresh and dry weight were reduced in response to heat stress, and physiological attributes such as photosynthetic rate, water use efficiency and chlorophyll contents were also reduced in response to heat stress, except transpiration rate and stomatal conductance, which increased under heat stress and showed recovery by proline application. Exogenous application of proline promoted tolerance against heat stress in chilli genotypes and enhanced growth. All the observed traits exhibited recovery in response to proline stimulus, indicating the role of proline in mitigating the consequences of heat stress. Recovery also depends on genetic capability of various cultivars.

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Physiological and biochemical response to higher temperature stress in hot pepper (Capsicum annuum L.)

Cited by 17 publications

References 24 publications

Response and Defence Mechanisms of Vegetable Crops against Drought, Heat and Salinity Stress

Response and Defence Mechanisms of Vegetable Crops against Drought, Heat and Salinity Stress

Heat-tolerant hot pepper exhibits constant photosynthesis via increased transpiration rate, high proline content and fast recovery in heat stress condition

Role of Proline in Mitigating the Deleterious Effects of Heat Stress in Chillies

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