Dry Matter Assimilation and Partitioning in Pepper Cultivars Differing in Susceptibility to Stress-induced Bud and Flower Abscission

Turner, A.D.; Wien, H.C.

doi:10.1006/anbo.1994.1077

Cited by 29 publications

(8 citation statements)

References 13 publications

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“…The analysis with Cox proportional hazards model shows that source/sink ratio plays an important role in fruit abortion, as was already shown by previous authors Turner and Wien, 1994). If the source/sink ratio is higher, there are more assimilates to distribute to the individual flowers/fruits and so the probability of abortion decreases.…”

Section: Discussionsupporting

confidence: 73%

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Survival Analysis of Flower and Fruit Abortion in Sweet Pepper

Wubs¹,

Heuvelink²,

Marcelis³

et al. 2007

Acta Hortic.

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In order to obtain a crop growth model that can simulate inter-and intra-plant variation in fruit set, fruit abortion times in sweet pepper were analysed by means of survival analysis. Survival analysis is a statistical technique dealing with the timing of events. The Cox proportional hazards model estimates the instantaneous baseline probability of abortion per time (hazard rate), given that the fruit has not aborted yet. It also estimates the effect of explanatory factors (covariates) on the abortion rate. Two important factors known to influence abortion in sweet pepper are the supply and demand for assimilates (source and sink strength, respectively). A plant density experiment was analysed, as density influences plant source and indirectly also sink strength. Flowering as well as abortion or harvest dates were recorded for all individual flowers and fruits. LAI was measured to calculate the source strength with a photosynthesis-based simulation model. Empirical curves showed that survival of flowers and fruits (per plant) was higher at 1.6 plants/m 2 than at 3.1 or 4.6 plants/m 2 . Plant density, source strength and source/sink ratio all correlated with the treatment plant density, but source/sink ratio explained most of the variation in the data in a Cox proportional hazards model. Averaging the source/sink ratio over seven days gave the best fit. Adding the position within the node (main or side branch) improved the fit; flowers from the side branch had a higher probability of abortion per unit time than flowers from the main branch. The susceptibility for fruit abortion differed among plants. The baseline hazard rate indicated that between 0 and 13 days after anthesis, flowers were most susceptible for abortion. INTRODUCTIONIn general, process-based crop growth models simulate the growth of average plants. However, in reality a lot of variation exists in growth and development between plants and between similar organs within one plant. A crop growth model taking this variation into account, for example by using a stochastic function, can predict variations in crop growth more realistically. Because the output of such a model is different for every model run, confidence intervals for expected yield or crop growth can be obtained. One of the possibilities to include this variation is by implementing results of a survival analysis into a crop growth model. Survival analysis is a statistical technique for the analysis of timing of events (Kleinbaum, 1995).

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Section: Discussionsupporting

confidence: 73%

“…Further, only one cultivar was analysed. Turner and Wien (1994) showed that there are cultivar differences in susceptibility to abortion due to different light levels. More experiments are needed to see if this cultivar difference can be quantified in a parameter, or that separate baseline hazard rates need to be defined.…”

Section: Discussionmentioning

confidence: 99%

Survival Analysis of Flower and Fruit Abortion in Sweet Pepper

Wubs¹,

Heuvelink²,

Marcelis³

et al. 2007

Acta Hortic.

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“…The highest RGR value, 0.103 g·g -1 ·d -1 , corresponded to the initial phase of the cultivation cycle (between 0 and 15 DAT); and after this period there was a drop in the value of this parameter. The RGR values were slightly higher than those determined for pepper (Turner and Wien, 1994) and pepino (Fresquet et al, 2001). …”

Section: Discussionmentioning

confidence: 73%

Growth and Nutrient Absorption of Cape Gooseberry (Physalis PeruvianaL.) in Soilless Culture

Pascual-Seva

Bautista

Pascual

et al. 2015

Journal of Plant Nutrition

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Cape gooseberry (Physalis peruviana L.) is a solanaceous plant. The growth and time-course of nutrient accumulation of the plant and its partitioning between roots, stems, leaves, and fruits were examined. The study was conducted analyzing two nutrient solutions in soilless culture under greenhouse conditions during two consecutive seasons. The macronutrient contents were analyzed. On average, the yield was 8.9 t·ha -1 . Growth of the plant until 90 d after transplanting obeys an exponential function of time and the relative growth rate for this period was determined. Nitrogen (N) was the element that showed the highest concentration, corresponding to leaves (4.67%), followed by potassium (K) in stems (4.46%). The highest accumulations of N, phosphorous (P), calcium (Ca), and magnesium (Mg) were found in leaves and of K in the stems.Potassium showed the highest nutrient accumulation (29 g·plant -1 ) and the highest specific uptake rate.

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“…5). Notably, it has been previously shown that photosynthetic rates are related to pepper flower abortion (Aloni et al 1996) as a higher availability of assimilates would contribute to a smaller flower abortion rate; however, this relationship alone does not explain the differences in cultivar susceptibility to flower abscission (Turner and Wien 1994;Aloni et al 1996). It is worthy to note that the carbon allocation to the flower and its metabolism within the flower is most likely more important for fruit retention than is photosynthesis (Aloni et al 1996).…”

Section: Discussionmentioning

confidence: 95%

Exploring natural variation of photosynthetic, primary metabolism and growth parameters in a large panel of Capsicum chinense accessions

Rosado-Souza

Scossa

Chaves

et al. 2015

Planta

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Collectively, the results presented improve upon the utility of an important genetic resource and attest to a complex genetic basis for differences in both leaf metabolism and fruit morphology between natural populations. Diversity of accessions within the same species provides an alternative method to identify physiological and metabolic traits that have large effects on growth regulation, biomass and fruit production. Here, we investigated physiological and metabolic traits as well as parameters related to plant growth and fruit production of 49 phenotypically diverse pepper accessions of Capsicum chinense grown ex situ under controlled conditions. Although single-trait analysis identified up to seven distinct groups of accessions, working with the whole data set by multivariate analyses allowed the separation of the 49 accessions in three clusters. Using all 23 measured parameters and data from the geographic origin for these accessions, positive correlations between the combined phenotypes and geographic origin were observed, supporting a robust pattern of isolation-by-distance. In addition, we found that fruit set was positively correlated with photosynthesis-related parameters, which, however, do not explain alone the differences in accession susceptibility to fruit abortion. Our results demonstrated that, although the accessions belong to the same species, they exhibit considerable natural intraspecific variation with respect to physiological and metabolic parameters, presenting diverse adaptation mechanisms and being a highly interesting source of information for plant breeders. This study also represents the first study combining photosynthetic, primary metabolism and growth parameters for Capsicum to date.

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Dry Matter Assimilation and Partitioning in Pepper Cultivars Differing in Susceptibility to Stress-induced Bud and Flower Abscission

Cited by 29 publications

References 13 publications

Survival Analysis of Flower and Fruit Abortion in Sweet Pepper

Survival Analysis of Flower and Fruit Abortion in Sweet Pepper

Growth and Nutrient Absorption of Cape Gooseberry (Physalis PeruvianaL.) in Soilless Culture

Exploring natural variation of photosynthetic, primary metabolism and growth parameters in a large panel of Capsicum chinense accessions

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