Physiological traits associated with high temperature tolerance differ by fruit types and sizes in tomato (Solanum lycopersicum L.)

Rajametov, Sherzod Nigmatullayevich; Yang, Eun Young; Cho, Myeong Cheoul; Chae, Soo Young; Chae, Won Byoung

doi:10.1007/s13580-020-00280-4

Cited by 22 publications

(46 citation statements)

References 42 publications

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“…The Fla. lines which have large fruit size under the heat stress conditions could be more heat tolerant than other large-fruited lines. In fact, a recent finding revealed that tomato traits associated with heat tolerance depend on the fruit size [ 62 ].…”

Section: Discussionmentioning

confidence: 99%

Genomic and Phenotypic Diversity of Cultivated and Wild Tomatoes with Varying Levels of Heat Tolerance

Ayenan

Danquah

Agre

et al. 2021

Genes

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Assessment of genetic variability in heat-tolerant tomato germplasm is a pre-requisite to improve yield and fruit quality under heat stress. We assessed the population structure and diversity in a panel of three Solanum pimpinellifolium (wild tomatoes) and 42 S. lycopersicum (cultivated tomatoes) lines and accessions with varying heat tolerance levels. The DArTseq marker was used for the sequencing and 5270 informative single nucleotide polymorphism (SNP) markers were retained for the genomic analysis. The germplasm was evaluated under two heat stress environments for five yield and flower related traits. The phenotypic evaluation revealed moderate broad-sense heritabilities for fruit weight per plant and high broad-sense heritabilities for fruit weight, number of inflorescences per plant, and number of flowers per inflorescence. The hierarchical clustering based on identity by state dissimilarity matrix and UPGMA grouped the germplasm into three clusters. The cluster analysis based on heat-tolerance traits separated the germplasm collection into five clusters. The correlation between the phenotypic and genomic-based distance matrices was low (r = 0.2, p < 0.05). The joint phenotypic and genomic-based clustering grouped the germplasm collection into five clusters well defined for their response to heat stress ranging from highly sensitive to highly tolerant groups. The heat-sensitive and heat-tolerant clusters of S. lycopersicum lines were differentiated by a specific pattern of minor allele frequency distribution on chromosome 11. The joint phenotypic and genomic analysis revealed important diversity within the germplasm collection. This study provides the basis for efficient selection of parental lines to breed heat-tolerant varieties.

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Section: Discussionmentioning

confidence: 99%

Genomic and Phenotypic Diversity of Cultivated and Wild Tomatoes with Varying Levels of Heat Tolerance

Ayenan

Danquah

Agre

et al. 2021

Genes

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“…The importance of tomato plants in agricultural crops has certainly emerged. However, while reproductive tolerance during heat stress is an important value for the evaluation of tomato cultivars yield [13][14][15][16], tomatoes, in vegetative and reproductive stages, are sensitive to high temperature and have varying sensitivity to stress [17,18].…”

Section: Introductionmentioning

confidence: 99%

“…The yield traits of tomatoes depending on the growth conditions are noticeably varied in one genotype [16]. Recently, multiple methods to screen for heat-tolerant tomato plants were validated at different growth stages under heat stress conditions [2][3][4]15]. The responses of different traits to the high temperature varied, and the results of correlation analysis showed the relationships between various traits (pollen viability, fruit set, flower number per inflorescence) within the control and heat-treated plants, but not between the two [14].…”

Section: Introductionmentioning

confidence: 99%

Heat Treatment in Two Tomato Cultivars: A Study of the Effect on Physiological and Growth Recovery

et al. 2021

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High temperature (HT) significantly affects crop physiological traits and reduces productivity in plants. To increase yields as well as survival of crops under HT, developing heat-tolerant plants is one of the main targets in crop breeding programs. The present study attempted to investigate the linkage of the heat tolerance between the seedling and reproductive growth stages of tomato cultivars ’Dafnis‘ and ’Minichal.’ This research was undertaken to evaluate heat tolerance under two experimental designs such as screening at seedling stage and screening from reproductive traits in greenhouses. Survival rate and physiological responses in seedlings of tomatoes with 4-5 true leaves were estimated under HT (40 °C, RH 70%, day/night, respectively) and under two control and HT greenhouse conditions (day time 28 °C and 40 °C, respectively). Heat stress significantly affected physiological–chemical (photosynthesis, electrolyte conductivity, proline) and vegetative parameters (plant height, shoot fresh weight, root fresh weight) in all tomato seedlings. The findings revealed that regardless of tomato cultivars the photosynthesis, chlorophyll, total proline and electrical conductivity parameters were varied in seedlings during the heat stress period. The heat tolerance rate of tomatoes in the seedling stage might not always be associated with reproductive parameters. HT reduced fruit parameters such as fruit weight (31.9%), fruit length (14.1%), fruit diameter (19.1%), and fruit hardness (9.1%) compared to NT under HT in heat-susceptible tomato cultivar ‘Dafnis’, while in heat-tolerant cultivar ‘Minichal’ fruit length (7.1%) and fruit diameter (12.1%) was decreased by the effects of HT, but on the contrary fruit weight (3.6%) and fruit hardness (8.3%) were increased. In conclusion, screening and selection for tomatoes should be evaluated at the vegetative and reproductive stages with consideration of reproductive parameters.

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“…In the plants of pepper with different LHD signi cantly reduced both FS and NFR per plant regardless of cultivars. The fruit setting is the main indicator for screening the response of genotype on abiotic stress condition 1,5,32 , and heat stress may signi cantly reduce or increase the FS and number of owers 5,17,18,22 .…”

Section: Discussionmentioning

confidence: 99%

“…NFR can be used as predictor for FS in screening of the heat tolerant genotype since it positively correlates with FS in HT and that NT 16,18 . The plants of the cv.…”

Section: Discussionmentioning

confidence: 99%

Morpho-Physiological Response to Heat Stress During Seedling Stage and Interrelation With Agronomical Traits in Pepper (Capsicum Annuum L.) Cultivars Differing in Heat Tolerance

Rajametov¹,

Yang²,

Cho³

et al. 2020

Preprint

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Identification of heat tolerance trait in pepper genotypes is an important for the breeding of heat tolerant cultivars in pepper. Therefore, in the present study were investigated effect of heat treatment (HT) on morpho-physiological and biochemical status of two commercial pepper cultivars “Chyung Yang” and “New Bigarim” in seedling stage and their post-treatment reproductive ability. The seedlings with 8-10 true leaf stage were maintained at day and night temperature of 42°C for 10 days and cv. “Chyung Yang” were identified as a heat tolerant and “New Bigarim” as a susceptible to heat stress. The HT survival were revealed during 5 days and the threshold of heat tolerance were determined within 10 days of treatment among cultivars. We found no significant relation between leaf heat damage levels (LHD) with chlorophyll content (CHL). During HT were identified significant reducing of the biomass of seedlings, whereas the photosynthetic rate (PN), intercellular CO2 concentration (Ci), stomatal conductance (Gs) and transpiration rate (Tr) values were increased than in normal treatment (NT) seedlings. The cell membrane thermostability values were not steady during HT and in heat treated seedlings at recovery stages, where electrical conductivity (EC) rate showed of the increasing in seedlings at HT than NT. Total free proline content (PRL) significantly increased in HT stressed seedlings over NT on day 5 of treatment, when survival of seedlings were finished. In both cultivar plants with different LHD were identified the significantly increasing of PRL than NT plants at recovery, where the mean fold increase within 2-3 times than in seedlings which were exposed to the HT. LHD significantly effected on reproductive growth stage, where LHD levels over 25% was critical for plants recovery. There no identified the any significant the linkage of heat tolerance in seedling stage with reproductive growth stage, where cv. “Chyung Yang” was determined as a heat tolerant in seedling stage but in reproductive stage it showed negative index of agronomical traits.

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Physiological traits associated with high temperature tolerance differ by fruit types and sizes in tomato (Solanum lycopersicum L.)

Cited by 22 publications

References 42 publications

Genomic and Phenotypic Diversity of Cultivated and Wild Tomatoes with Varying Levels of Heat Tolerance

Genomic and Phenotypic Diversity of Cultivated and Wild Tomatoes with Varying Levels of Heat Tolerance

Heat Treatment in Two Tomato Cultivars: A Study of the Effect on Physiological and Growth Recovery

Morpho-Physiological Response to Heat Stress During Seedling Stage and Interrelation With Agronomical Traits in Pepper (Capsicum Annuum L.) Cultivars Differing in Heat Tolerance

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