Soybean fruit development and set at the node level under combined photoperiod and radiation conditions

Nico, Magalí; Mantese, Anita I.; Miralles, Daniel J.; Kantolic, Adriana G.

doi:10.1093/jxb/erv475

Cited by 36 publications

(43 citation statements)

References 55 publications

(91 reference statements)

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“…Two hypotheses can be constructed about this phenomenon. The first is that plants with lower EDAS values have greater flowering and fruiting periods by altering intra-nodal pod interactions, similar to the effects that occur when the photoperiod increases, generating more pods [33]. Another hypothesis is that the greater accumulation of photoassimilates leads to greater fruiting [34].…”

Section: Discussionmentioning

confidence: 97%

Soybean Seed Vigor: Uniformity and Growth as Key Factors to Improve Yield

et al. 2020

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Emergence uniformity and the time required for emergence are essential factors for obtaining highly productive potential in plants. Factors such as sowing depth and soil moisture affect uniformity and emergence, but little is known about the impacts of seed vigor. Thus, we determined the impacts of seed vigor on uniformity and growth as well as development and yield in soybean (Glycine max [L.] Merrill) plants. The treatments consisted of four vigor levels (89%, 57%, 47%, and 43%) obtained by accelerated aging, in a randomized block design, with five replicates at three sites. Seeds with the highest vigor level showed higher uniformity and faster emergence. Dominated plants through their phenotypic plasticity modify stem diameter and internode length. The plants that emerged earlier had a larger leaf area in the three stages (V1, V4, and R2), allowing them to accumulate more photoassimilates in the initial stages. Consequently, these plants exhibited an increase in yield components, especially in the number of fertile nodes and the number of pods per plant, making them more productive.

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Section: Discussionmentioning

confidence: 97%

Soybean Seed Vigor: Uniformity and Growth as Key Factors to Improve Yield

et al. 2020

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“…Pod number per node also increased with the duration of the R1 to R3 period in all combinations except June + NIL‐ e4 (Figure S4). Nico, Mantese, Miralles, and Kantolic () reported that artificial photoperiod extension increased pods per node on the main stems, by increasing pods and flowers on lateral racemes and extending the flowering period. Therefore, another possible explanation for the difference in the temperature response of pod number at the node level was the indirect effect such as the phenological change caused by temperature, sowing date (photoperiod), and E4/e4 alleles in this study.…”

Section: Discussionmentioning

confidence: 99%

Is the yield change due to warming affected by photoperiod sensitivity? Effects of the soybean E4 locus

Kumagai

Yamada

Hasegawa

2019

Food and Energy Security

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Modeling studies predict that global warming will shorten growth duration and reduce seed yield of early‐maturing soybean (Glycine max) cultivars, but that late‐maturing cultivars could mitigate this reduction. This is widely discussed but has not been validated experimentally. Time of soybean maturation is determined by several photoperiod‐sensitive loci. Here, we focused on the E4 locus, and tested the hypothesis that this locus would mitigate the growth period shortening and yield reduction due to warming. We sowed cv. Enrei with the dominant E4 allele and a near‐isogenic line with recessive e4 allele (NIL‐e4) on two dates (normal vs. late, with a shorter photoperiod) and grown under three temperature regimes (near‐ambient, and 2.0 and 4.6°C above ambient) in sunlit greenhouses in a cool region of Japan. The period from sowing to flowering (R1) decreased with increasing temperature, regardless of genotype and sowing date. However, increased temperature prolonged the period from R1 to the beginning of pod filling (R3) in Enrei but not in NIL‐e4 for either sowing date. This indicates that increasing temperature shortened the period before R1, exposing Enrei with E4 to a longer photoperiod and therefore slowing its development. For both sowing dates, pod number and seed yield increased with warming in Enrei. Since the days from R1 to R3 and the cumulative radiation for this period were positively correlated with pod number in Enrei, the greater yield response was explained mostly by the prolongation of this period caused by warming. However, the yield increase resulted partially from the current mean growing season temperature, which was near or below the optimum for yield. We conclude that the E4 locus can increase seed yield under future warming in cool regions of Japan. This result demonstrates the potential importance of modifying photoperiod sensitivity to increase soybean yield under future warming.

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“…Moreover, high temperature is reported to delay the onset of seed growth and reduce seed growth rate [19], which may also alleviate the competition. Similarly, it has been reported that the effective seed fillings on primary racemes were delayed by long days, resulting in the prolonged flowering duration and increased number of flowers on lateral racemes [20].…”

Section: Late Opened Flowersmentioning

confidence: 77%

Temporal Patterns of Flowering and Pod Set of Determinate Soybean in Response to High Temperature

et al. 2020

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Global warming is expected to affect yield-determining factors of soybean (Glycine max (L.) Merr.), including the number of flowers and pods. However, little is known about the effects of high temperature on the temporal patterns of flowering and pod set. Experiments in the temperature-controlled greenhouses were conducted to examine the temporal pattern of flowering in determinate soybean cultivar "Sinpaldalkong" and to assess the effects of high temperature on the flower number, pod-set ratio, and pod number of the early-and late-opened-flowers and their contributions to overall pod number. The experiment comprised five sowing dates in 2013-2015 and four temperature treatments, namely ambient temperature (AT), AT + 1.5 • C, AT + 3.0 • C, and AT + 5.0 • C. Flowering duration (i.e., days between the first flowering and the last flowering) was extended by higher temperature and earlier sowing. The temporal distribution of flowering showed a bimodal distribution except for the experiment with the shortest flowering duration, i.e., second sowing in 2014. More flowers were produced in the late flowering period at high temperatures; however, most of these late-opened-flowers failed to reproduce, regardless of temperature conditions, resulting in a negligible contribution to the overall pod number. For the early-opened-flowers, the number of flowers was not significantly affected by temperature, while the pod-set ratio and pod number decreased with high temperatures resulting in a decrease in the overall pod number at temperatures above 29.4 • C.

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Soybean fruit development and set at the node level under combined photoperiod and radiation conditions

Abstract: HighlightLong days during post-flowering postpone elongation and active growth of dominant pods within a node, which extends flowering and allows pod set at usually dominated positions.

Cited by 36 publications

References 55 publications

Soybean Seed Vigor: Uniformity and Growth as Key Factors to Improve Yield

Soybean Seed Vigor: Uniformity and Growth as Key Factors to Improve Yield

Is the yield change due to warming affected by photoperiod sensitivity? Effects of the soybean E4 locus

Temporal Patterns of Flowering and Pod Set of Determinate Soybean in Response to High Temperature

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