Low Night Temperature Increases Ovary Size in Sweet Pepper Cultivars

Cruz-Huerta, Nicacio; Williamson, Jeffrey G.; Darnell, Rebecca L.

doi:10.21273/hortsci.46.3.396

Cited by 11 publications

(8 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Climate changes, including low and high temperatures, strong wind, drought, flooding, and heavy rainfall can severely influence crop yield and productivity [2,5]. Particularly, reports demonstrated the impact of the night low temperature (NLT) with different temperature regimes during the period of entire growth and development [6,7]. The NLT remarkably affected seed germination, seedling growth, leaf morphology, stem diameter (SD), and plant height (PH) during the vegetative stages of tomato, cucumber, and pepper plants [7][8][9][10][11][12][13][14], causing poor growth and development.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Night Low Temperature on Agronomical Traits of Thirty-Nine Pepper Accessions (Capsicum annuum L.)

Rajametov¹,

Lee²,

Jeong³

et al. 2021

Agronomy

View full text Add to dashboard Cite

Pepper plants are subject to complex environmental factors including abiotic and biotic stresses in fields, as well as the significant effects of climate changes, including low and high temperatures. Low temperature stress in the growth and development of pepper plants is one of the most critical issues, and directly impacts the crop yield and productivity of pepper plants. Therefore, it is essential to select and breed low temperature-(LT) tolerant pepper (Capsicum annuum L.) cultivars. This research was conducted to assess the agronomical traits of 39 pepper accessions belonging to the chili and bell fruit varieties which were cultivated under two different night temperature set-points: at 15 °C for a suboptimal temperature (CT) and at 10 °C for a low temperature (LT). The plant heights (PH) of most pepper accessions in a LT were significantly decreased compared to those in a CT. The stem diameter (SD) and the length of main axis (LMA) varied depending on the genotypes under LT. Moreover, the number of flowers (NFL), total number of fruits (NFR), fruit yield (FY), fruit fresh weight (FFW), fruit length (FL), fruit diameter (FD), and number of seeds in a fruit (NSF) remarkably declined in a LT compared to in a CT. The evaluated agronomical traits between LT and CT were further applied for the correlation analysis, principal component analysis (PCA), and hierarchical cluster analysis. Notably, the FY trait was correlated with other reproductive traits including NFR, FFW, FD, and FL on the positive directions and thirty-nine LT-treated pepper accessions were clustered into seven groups by the hierarchical clustering analysis. The selected accessions were primarily involved in the positive trends with the reproductive index including NFR, FL, FD, and FFW traits and could be used for pepper breeding programs to develop LT-tolerant cultivars.

show abstract

Section: Introductionmentioning

confidence: 99%

The Effect of Night Low Temperature on Agronomical Traits of Thirty-Nine Pepper Accessions (Capsicum annuum L.)

Rajametov¹,

Lee²,

Jeong³

et al. 2021

Agronomy

View full text Add to dashboard Cite

show abstract

“…The studies have assessed that the impact of LT on anther and ovary shapes, causing the malformation of floral organs including the stunted stamen, the decreased number of pollen, and the reduced pollen activity by hindering pollination and fertilization [18,22], which further led to the abnormal formations of fruit development, irregular fruit shapes, and parthenocarpic fruits, together with reduced NSF [18,41]. The malformation of fruit shapes was produced by swollen ovary and shorten style in LT as previous studies mentioned in rice, mango, and pepper plants [2,6,42,43], indicating that the development of floral organs with stamen and ovary are very sensitive to LT. Moreover, the parthenocarpic fruits and the declined NSF are associated with the balance of plant hormones including auxin, gibberillin, and cytokinin due to the lack of fertilization, but might not be the defect of pollination [44,45].…”

Section: Discussionmentioning

confidence: 91%

“…Pepper plants have been naturally exposed to harsh cold stress during winter season in agriculture and possess the cellular and molecular mechanisms to acclimate and overcome the low temperature stress [33][34][35][36]. Previous reports have been demonstrated in the response to LT with limited accessions and mainly in reproductive traits including flower morphologies, fruit shapes, fruit types, and fruit yield [6,18,19]. In addition, the effect of LT on the agronomical traits has been reported primarily in bell pepper.…”

Section: Discussionmentioning

confidence: 99%

The Effect of Night Low Temperature on Agronomical Traits of Thirty-Nine Pepper Accessions (<em>Capsicum annuum</em> L.)

Rajametov¹,

Lee²,

Jeong³

et al. 2021

Preprint

View full text Add to dashboard Cite

Pepper plants experience complex environmental factors including abiotic and biotic stresses in field and the importance of climate changes including low and high temperatures has been emerged. Low temperature stress in the growth and development is one of the most critical issues, which directly impact on the crop yield and productivity of pepper plants. It is essential to select and breed low temperature-(LT) tolerant pepper (Capsicum annuum L.) cultivars. The research was performed to assess the agronomical traits of 39 pepper accessions belonging to chili and bell fruit types which cultivated two different night temperature set-points at 15°C for suboptimal temperature (CT) and at 10°C for low temperature (LT), respectively. Plant heights (PH) of most pepper accessions in LT were significantly decreased compared to those in CT. The stem diameter (SD) and the length of main axis (LMA) were various depending on the genotypes under LT. Moreover, the number of flowers (NFL), the total number of fruits (NFR), fruit yield (FY), fruit fresh weight (FFW), fruit length (FL), fruit diameter (FD), and the number of seeds in a fruit (NSF) were notably declined in LT compared to CT. The evaluated agronomical traits between LT and CT were further applied for the correlation analysis, the principal component analysis (PCA), and the hierarchical cluster analysis. Notably, FY trait was correlated with other reproductive traits including NFR, FFW, FD, and FL on positive directions and LT treated-39 pepper accessions were clustered into seven groups by the clustering analysis. The selected accessions were primarily involved with the positive trends with the reproductive index including NFR, FL, FD, and FW traits and would be used for pepper breeding programs on developing LT-tolerant cultivars.

show abstract

“…At the sixth-leaf stage (%50 d after sowing), seedlings were transplanted to 1.5-L containers using the same growing media for germination and maintained in the growth chambers throughout the experiments. Plants were pruned to two axes, as previously described (Cruz-Huerta et al, 2011). Briefly, two shoots were allowed to grow at the first branching point to form the main stems.…”

Section: Methodsmentioning

confidence: 99%

“…As the duration of LNT increases beyond %1 week, both the percentage of ovaries that exhibit swelling (Aloni et al, 1999;Polowick and Sawhney, 1985) and the extent of ovary swelling (Cruz-Huerta et al, 2011) increase. Increased source-sink ratio also increases the proportion of swollen ovaries.…”

mentioning

confidence: 99%

Night Temperature and Source-sink Effects on Growth, Leaf Carbon Exchange Rate, and Carbohydrate Accumulation in Bell Pepper Ovaries

Darnell¹,

Cruz-Huerta²,

Williamson³

2013

J. Amer. Soc. Hort. Sci.

Self Cite

View full text Add to dashboard Cite

Low night temperatures and/or high source-sink ratios increase ovary swelling and subsequent fruit malformation in many sweet peppers (Capsicum annuum), including bell pepper. Although this response has been correlated with increased ovary carbohydrate accumulation, evidence for this is limited. Furthermore, it is unknown how the combined effects of night temperature and source-sink ratio affect ovary carbohydrate accumulation and ovary swelling. The objectives of the present work were to determine night temperature and source-sink effects on ovary swelling, net carbon exchange rate (CER), and soluble sugar and starch concentrations in bell pepper ovaries at anthesis. Source-sink and temperature effects were tested by comparing fruiting (low source-sink ratio or high sink demand) with non-fruiting (high source-sink ratio or low sink demand) ‘Legionnaire’ bell pepper plants grown at 22/20 °C [high night temperature (HNT)] or 22/12 °C [low night temperature (LNT)] day:night temperatures. Flowers that opened after imposition of the temperature and fruiting treatments were harvested at anthesis. Ovaries from harvested flowers were weighed and analyzed for non-structural carbohydrates. Leaf gas exchange measurements were performed every 3 days. Ovary fresh weight of flowers harvested at anthesis was highest in non-fruiting plants under LNT and lowest in plants grown under HNT regardless of fruiting status. Mean CER averaged over the experimental period was significantly higher in fruiting plants under HNT compared with all other treatments. There were no significant interactions between night temperature and fruiting status on ovary soluble sugar or starch concentrations. Low night temperature increased glucose, fructose, and starch concentration and decreased sucrose concentration in the ovary wall compared with HNT. There were no differences in soluble sugar or starch concentrations in the ovary wall between fruiting and non-fruiting plants. Thus, although both low temperature and high source-sink ratio (i.e., non-fruiting plants) resulted in ovary swelling, the mechanisms appear to differ. Whereas LNT effects on ovary swelling were associated with increased ovary carbohydrate accumulation, this association was not apparent when ovary swelling occurred in response to high source-sink ratios.

show abstract

Low Night Temperature Increases Ovary Size in Sweet Pepper Cultivars

Cited by 11 publications

References 15 publications

The Effect of Night Low Temperature on Agronomical Traits of Thirty-Nine Pepper Accessions (Capsicum annuum L.)

The Effect of Night Low Temperature on Agronomical Traits of Thirty-Nine Pepper Accessions (Capsicum annuum L.)

The Effect of Night Low Temperature on Agronomical Traits of Thirty-Nine Pepper Accessions (<em>Capsicum annuum</em> L.)

Night Temperature and Source-sink Effects on Growth, Leaf Carbon Exchange Rate, and Carbohydrate Accumulation in Bell Pepper Ovaries

Contact Info

Product

Resources

About