The non-impairment of pollination and fertilization in the abscission of chilli (Capsicum annuum L. Var. Kulai) flowers under high temperature and humid conditions

Usman, I. S.; Mamat, Awang Soh; Mohd, Hasan Syed Zain Syed; Aishah, H. Siti; Anuar, Abd.Rahim

doi:10.1016/s0304-4238(98)00171-x

Cited by 12 publications

(6 citation statements)

References 13 publications

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“…The response of chile pepper to high temperatures at the vegetative (generally seedling) [34,[39][40][41][42][43] and reproductive [23,24,26,44,45] stages during the growing season has been previously explored. In recent years, researchers have characterized differentially expressed genes in response to high-temperature stress in chile pepper [34,[39][40][41][42].…”

Section: Discussionmentioning

confidence: 99%

Growing Environment and Heat Treatment Effects on Intra- and Interspecific Pollination in Chile Pepper (Capsicum spp.)

Lin

Wang

et al. 2021

Agronomy

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Heat tolerance is important for the sustainable production of many crops, including chile pepper. Tolerance to high temperature is complex and involves various component traits, with pollen viability being among the most important. in vitro pollen assays for heat tolerance have been widely used in chile pepper; however, associations between the pollen treatment and pollination have not been widely explored. The objectives of this study were to validate the utility of in vitro heat stress pollen characterization through in vivo pollination during summer and winter seasons and to evaluate the cross-compatibility among wild and domesticated species to initiate introgression population development. Seven entries of wild and domestic Capsicum species grown during the summer and winter seasons were used to evaluate pollination success rate. Pollen was either used directly or treated at 38 °C for four hours before making reciprocal self- and cross-pollination among all the entries. Significant associations between in vitro pollen treatment and pollination success rate during summer and winter seasons were identified. Heat treatment was a greater contributor to variability than the growing environment, which validates previous reports on the usefulness of studying pollen in vitro in selection for heat tolerance. Accessions of the wild progenitor C. annuum var glabriusculum, PBC 1969 and PBC 1970, were identified as a potential heat-tolerant source for use in breeding and future research. This work provides a basis for future research in exploring additional heat tolerance components as well as for the development of phenotyping assays for pollen or other floral traits.

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Section: Discussionmentioning

confidence: 99%

Growing Environment and Heat Treatment Effects on Intra- and Interspecific Pollination in Chile Pepper (Capsicum spp.)

Lin

Wang

et al. 2021

Agronomy

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“…Heat tolerance is a complex phenotype consisting of several component traits, each of which likely has complex inheritance patterns (De la Peña et al, 2011;Driedonks et al, 2016;Hanson et al, 2002;Hedhly, 2011). The response of pepper to high temperatures at the vegetative (generally seedling) (Ali et al, 2020;Feng, et al, 2019;Li et al, 2015;Rajametov et al, 2021;Usman et al, 2015;Zhai et al, 2016) and reproductive (Aloni et al, 2001;Erikson and Markhart, 2002;Motamedi et al, 2018;Polowick and Sawhney, 1985;Usman et al, 1999) stages during the growing season have previously been explored. Among the most important component traits of heat tolerance in fruiting crops, such as pepper, involve reproductive tissues, especially pollen (Dane et al, 1991;Giorno et al, 2013;Hedhly et al, 2009).…”

Section: Discussionmentioning

confidence: 99%

Impedance Flow Cytometry for Selection of Pollen Traits Under High Temperature Stress in Pepper

Lin

Yee

et al. 2022

horts

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High temperature stress is a major limiting factor for pepper productivity, which will continue to be a problem under climate change scenarios. Developing heat tolerant cultivars is critical for sustained pepper production, especially in tropical and subtropical regions. In fruiting crops, like pepper, reproductive tissues, especially pollen, are the most sensitive to high temperature stress. Typically, pollen viability and germination are assessed through staining and microscopy, which is tedious and potentially inaccurate. To increase efficiency in assessing pollen traits of pepper, the use of impedance flow cytometry (IFC) has been proposed. We conducted three independent experiments to determine the most effective methodology to use IFC for evaluating pollen traits for heat tolerance in pepper. Seven floral developmental stages were evaluated, and stages 3, 4, and 5 were found to best combine high pollen concentration and activity. Flowers in development stages 3, 4, or 5 were then heat treated at 41, 44, 47, 50, and 55 °C or not heat treated (control). The critical temperature to assess heat tolerance using IFC was found to be 50 °C, with a reduction in pollen activity and concentration occurring at temperatures greater than 47 °C. Twenty-one entries of pepper were then accessed for pollen traits using the staining and IFC methods over 2 months, April (cooler) and June (hotter). Growing environment was found to be the greatest contributor to variability for nearly all pollen traits assessed, with performance during June nearly always being lower. PBC 507 and PBC 831 were identified as being new sources of heat tolerance, based on using IFC for assessing pollen. Pollen viability determined by staining and pollen activity determined using IFC were significantly positively correlated, indicating that IFC is an efficient and accurate method to assess pollen traits in pepper. This work provides a basis for further research in this area and supports more efficient breeding of heat-tolerant cultivars.

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“…Also, pollination and fertilization of hot pepper are significantly decreased at >30°C air temperature conditions (Erickson & Markhart, ; Khah & Passam, ; Pagamas & Nawata, ). Also, at <35°C night air temperature condition, the pollen viability and pollen tube behavior are reduced (Gajanayake, Trader, Reddy, & Harkess, ; Usman, Mamat, Mohd, Aishah, & Annuar, ). Thus, the control and RCP 4.5 treatments had normal shaped hot pepper fruits, while the RCP 8.5 treatment showed abnormal development (Figure b).…”

Section: Discussionmentioning

confidence: 99%

Impact of moderate and extreme climate change scenarios on growth, morphological features, photosynthesis, and fruit production of hot pepper

Kim¹,

Kim²,

Lee³

et al. 2017

Ecology and Evolution

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Horticultural crop production and changes in physiological aspects during the growing season may be affected by climate change factors (CC), which include increased temperature and the associated doubling or tripling of atmospheric CO2 concentrations. However, the potential effects are complex and many parameters might impact on the observed effects. To evaluate the effects of CC, the growth, yield, fruit characteristics, photosynthetic traits, and morphological characteristics of hot peppers were investigated. The hot peppers were grown under two CC scenarios, with the Representative Concentration Pathway (RCP) of 4.5 (Temp.; +3.4°C, CO2 conc.; 540 μmol/mol, Precipitation +17.3%) and RCP 8.5 (Temp.; +6.0°C and CO2 conc.; 940 μmol/mol, Precipitation +20.3%), respectively, using extreme weather simulators. This was compared with existing weather conditions occurring in Jeonju, South Korea in terms of air temperature, relative humidity, radiation, and precipitation. Overall, the plant height showed the highest under moderate CC conditions (RCP 4.5) among all the treatments tested. The number of leaves in the RCP 8.5 condition showed 7,739/plants, which was 2.2 times higher than that of the control. In addition, fruit shape was shortened and percentage dry matter was also the highest. The yield of hot pepper in the CC RCP 4.5 and 8.5 conditions were decreased by 21.5% and 89.2% when compared with that of the control, respectively. The days to harvest in the condition of CC scenarios were shortened from 5 to 13 compared with that of control, predominantly due to the increased air temperature. The results indicated that the severe RCP CC scenarios made reduction in the yields and negative affection on the fruit qualities. Overall, hot pepper was tolerant of mild CC scenarios of temperature × CO2 but was significantly affected by more extreme CC interacting parameter concentrations (or similar).

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The non-impairment of pollination and fertilization in the abscission of chilli (Capsicum annuum L. Var. Kulai) flowers under high temperature and humid conditions

Cited by 12 publications

References 13 publications

Growing Environment and Heat Treatment Effects on Intra- and Interspecific Pollination in Chile Pepper (Capsicum spp.)

Growing Environment and Heat Treatment Effects on Intra- and Interspecific Pollination in Chile Pepper (Capsicum spp.)

Impedance Flow Cytometry for Selection of Pollen Traits Under High Temperature Stress in Pepper

Impact of moderate and extreme climate change scenarios on growth, morphological features, photosynthesis, and fruit production of hot pepper

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