Soybean Architecture Plants: From Solar Radiation Interception to Crop Protection

Chavarria, Geraldo; Caverzan, Andréia; Müller, Mariele; MiroslavaRakocevic,

doi:10.5772/67150

Cited by 5 publications

(4 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Regardless of the growth stage, soil moisture reduced pod number per plant and seed number per plant significantly, as observed during V-stage in 2020 when soil moisture was 7% for 24 days, and Fl-stage in 2021 when soil moisture was 1% for 27 days ( Figures 2A, B ; Figures 5D, E ; Wijewardana et al., 2018 ). Taken together, the overall effect of weather data in 2020 constrained the photosynthetic function and grain filling process, which resulted in a lower yield in 2020 than in 2021 ( Chavarria et al., 2017 ; Ismanov et al., 2019 ; Pinnamaneni et al., 2021 ).…”

Section: Discussionmentioning

confidence: 98%

See 1 more Smart Citation

Soybean resilience to drought is supported by partial recovery of photosynthetic traits

Elsalahy

Reckling

2022

Front. Plant Sci.

View full text Add to dashboard Cite

Climate change affects precipitation dynamics and the variability of drought frequency, intensity, timing, and duration. This represents a high risk in spring-sown grain legumes such as soybean. Yet, under European conditions, no evidence supports the potential recovery and resilience of drought-tolerant soybean cultivars after episodic drought, at different growth stages. A field experiment was conducted using a representative drought-tolerant cultivar of soybean (cv. Acardia), in 2020 and 2021, on sandy soils in Germany, applying four water regimes (irrigated, rainfed, early-drought, and late-drought stress). Drought stress was simulated by covering the plots during the event of rain with 6 × 6 m rainout shelters, at the vegetative (V-stage) and flowering (Fl-stage) stages. Drought response was quantified on plant height, chlorophyll fluorescence ratio (ChlF ratio), chlorophyll content (Chlc), and leaf surface temperature (LST), at different intervals after simulating drought until pod filling. Grain yield and yield components were quantified at the end of the growing season. Compared to rainfed conditions, a drought at V-stage and Fl-stage reduced significantly plant height, ChlF ratio, and Chlc by 20%, 11%, and 7%, respectively, but increased LST by 21% during the recovery phase. There was no recovery from drought except for Chlc after V-stage in 2021, that significantly recovered by 40% at the end of the growing season, signifying a partial recovery of the photochemical apparatus. Especially, there was no recovery observed in LST, implying the inability of soybean to restore LST within the physiological functional range (Graphical abstract). Under rainfed conditions, the grain yield reached 2.9 t ha-1 in 2020 and 5.2 t ha-1 in 2021. However, the episodic drought reduced the yield at V-stage and Fl-stage, by 63% and 25% in 2020, and 21% and 36% in 2021, respectively. To conclude, the timing of drought was less relevant for soybean resilience; however, pre- and post-drought soil moisture, drought intensity, and drought duration were likely more important. A drought-tolerant soybean cultivar may partially be drought-resilient due to the recovery of photosynthetic traits, but not the leaf thermal traits. Overall, these findings will accelerate future efforts by plant breeders, aimed at improving soybean drought resilience.

show abstract

Section: Discussionmentioning

confidence: 98%

“…Plant height is an important morphological characteristic that directly informs a crop’s overall growth and development ( Chavarria et al., 2017 ; Dong et al., 2019 ; Sobko et al., 2019 ). Results in Figures 3A, B show that drought inhibited the growth of soybean in terms of plant height in contrasting patterns over the two years.…”

Section: Discussionmentioning

confidence: 99%

Soybean resilience to drought is supported by partial recovery of photosynthetic traits

Elsalahy

Reckling

2022

Front. Plant Sci.

View full text Add to dashboard Cite

show abstract

“…Path analysis is a multivariate methodology closely related to multivariate regression where the path coefficients correspond to standardized regression coefficients for the linear model suggested by the path diagram ( Walsh and Lynch, 1998 ). The efficiency of light interception is directly affected by canopy architecture and function ( Bai et al, 2016 ; Chavarria et al, 2017 ). Changes in one standard unit of AGR40 are associated with changes in 0.86 standard units of Ei .…”

Section: Discussionmentioning

confidence: 99%

Genetic Relationships Among Physiological Processes, Phenology, and Grain Yield Offer an Insight Into the Development of New Cultivars in Soybean (Glycine max L. Merr)

2021

View full text Add to dashboard Cite

Soybean grain yield has steadily increased during the last century because of enhanced cultivars and better agronomic practices. Increases in the total biomass, shorter cultivars, late maturity, and extended seed-filling period are frequently reported as main contributors for better soybean performance. However, there are still processes associated with crop physiology to be improved. From the theoretical standpoint, yield is the product of efficiency of light interception (Ei), radiation use efficiency (RUE), and harvest index (HI). The relative contribution of these three parameters on the final grain yield (GY), their interrelation with other phenological–physiological traits, and their environmental stability have not been well established for soybean. In this study, we determined the additive–genetic relationship among 14 physiological and phenological traits including photosynthesis (A) and intrinsic water use efficiency (iWUE) in a panel of 383 soybean recombinant inbred lines (RILs) through direct (path analyses) and indirect learning methods [least absolute shrinkage and selection operator (LASSO) algorithm]. We evaluated the stability of Ei, RUE, and HI through the slope from the Finley and Wilkinson joint regression and the genetic correlation between traits evaluated in different environments. Results indicate that both supervised and unsupervised methods effectively establish the main relationships underlying changes in Ei, RUE, HI, and GY. Variations in the average growth rate of canopy coverage for the first 40 days after planting (AGR40) explain most of the changes in Ei. RUE is primarily influenced by phenological traits of reproductive length (RL) and seed-filling (SFL) as well as iWUE, light extinction coefficient (K), and A. HI showed a strong relationship with A, AGR40, SFL, and RL. According to the path analysis, an increase in one standard unit of HI promotes changes in 0.5 standard units of GY, while changes in the same standard unit of RUE and Ei produce increases on GY of 0.20 and 0.19 standard units, respectively. RUE, Ei, and HI exhibited better environmental stability than GY, although changes associated with year and location showed a moderate effect in Ei and RUE, respectively. This study brings insight into a group of traits involving A, iWUE, and RL to be prioritized during the breeding process for high-yielding cultivars.

show abstract

“…Soybean leaves express genetically different architectural characteristics, such as leaflet inclinations, azimuths, spatial distributions, and leaflet orientation (Zheng et al, 2008;Chavarria et al, 2017). Leaflet and petiole angles change throughout the day, particularly in the upper leaf canopy (Rakocevic et al, 2010), modifying the plant architecture (Rey et al, 2008;Nagasuga et al, 2013).…”

mentioning

confidence: 99%

Architectural Characteristics and Heliotropism May Improve Spray Droplet Deposition in the Middle and Low Canopy Layers in Soybean

et al. 2018

Self Cite

View full text Add to dashboard Cite

Leaf angle and plant architecture may determine the penetration of phytosanitary products in the low layer of soybean [Glycine max (L.) Merr.] plants, make the diseases control difficult, and promote losses in crop productivity. Strategies should be studied to increase the efficiency of deposition of phytosanitary products inside the canopy. The hypothesis of this work was that reversible leaf movements and plant architecture may change the penetration of spray droplets into the low layer of soybean plants. We evaluated whether plant architectural characteristics affect spray droplet deposition and monitored if heliotropic movements can increase the efficiency of applications of plant protection products. Four soybean cultivars were investigated. Plant architectural characteristics were evaluated in the V6, V9, R2, and R4 phenological stages, interception of photosynthetically active radiation was evaluated in the V9, R2, and R4 stages, and heliotropic movements were evaluated in the V6 and R4 stages. Sprayings were performed at 0800, 1100, 1400, and 1700 h in the R4 stage. Occurrence of diaheliotropic movements was greater in the V6 than in the R4 stage. The number of branches per plant in the R4 stage was 8, 14, 6, and 14, the branch size was 10.6, 25.8, 12.5, and 21.4 cm, and the leaf area index was 4.2, 4.7, 3.7, and 4.7 for cultivars ‘BMX Ativa RR’, ‘NA 5909 RG’, ‘95R51’, and ‘BMX Potência RR’, respectively. Those architectural characteristics played the most important role in droplet penetration into the low canopy layer. Droplet deposition in the low canopy layer was greater at daylight hours close to noon, showing that the paraheliotropism occurring in those daily hours is more helpful to droplet penetration deeper into the canopy than in other hours.

show abstract

Soybean Architecture Plants: From Solar Radiation Interception to Crop Protection

Cited by 5 publications

References 66 publications

Soybean resilience to drought is supported by partial recovery of photosynthetic traits

Soybean resilience to drought is supported by partial recovery of photosynthetic traits

Genetic Relationships Among Physiological Processes, Phenology, and Grain Yield Offer an Insight Into the Development of New Cultivars in Soybean (Glycine max L. Merr)

Architectural Characteristics and Heliotropism May Improve Spray Droplet Deposition in the Middle and Low Canopy Layers in Soybean

Contact Info

Product

Resources

About