Characterization and Grouping of All Primary Branches at Various Positions on a Rice Panicle Based on Grain Growth Dynamics

Zhao, Qian; Hao, Xiangyang; Ali, Izhar; Iqbal, Anas; Ullah, Saif; Huang, Min; Kong, Feiyang; Li, Tianyuan; Xuan, Ying; Li, Faqiao; Yan, Bo; Luo, Yingxin; He, Liang; Wei, Shanqing; Nianping, Chen; Jiang, Ligeng

doi:10.3390/agronomy10020223

Cited by 11 publications

(11 citation statements)

References 48 publications

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“…A striking example can be seen by shading leaves at pre‐anthesis, which reduces WSCs and subsequently final grain yield in wheat (Beed, Paveley, & Sylvester‐Bradley, 2007). As well as being influenced by architectural traits such as branching and panicle size (Fu et al, 2013; Yang, Yunying, Zhang, Liu, & Zhang, 2008; Zhao et al, 2020), sink size in rice is determined by the number of endosperm cells formed pre‐anthesis, which correlates with the availability of WSCs (Fu, Huang, Wang, Yang, & Zhang, 2011) and can be affected by heat stress at this stage (Zhen et al, 2020). It follows from the above that any factor that reduces the capacity for foliar photosynthesis pre‐anthesis (such as heat stress) jeopardizes both the development of a viable and strong reproductive sink and a reserve of carbon that later contributes to grain‐filling and can buffer yield against further environmental perturbation.…”

Section: The Role Of Source–sink Dynamics and Carbohydrate Reserves In Heat Stress Responsesmentioning

confidence: 99%

The potential of resilient carbon dynamics for stabilizing crop reproductive development and productivity during heat stress

Ferguson

Tidy

Murchie

et al. 2021

Plant Cell & Environment

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Impaired carbon metabolism and reproductive development constrain crop productivity during heat stress. Reproductive development is energy intensive, and its requirement for respiratory substrates rises as associated metabolism increases with temperature. Understanding how these processes are integrated and the extent to which they contribute to the maintenance of yield during and following periods of elevated temperatures is important for developing climate‐resilient crops. Recent studies are beginning to demonstrate links between processes underlying carbon dynamics and reproduction during heat stress, consequently a summation of research that has been reported thus far and an evaluation of purported associations are needed to guide and stimulate future research. To this end, we review recent studies relating to source–sink dynamics, non‐foliar photosynthesis and net carbon gain as pivotal in understanding how to improve reproductive development and crop productivity during heat stress. Rapid and precise phenotyping during narrow phenological windows will be important for understanding mechanisms underlying these processes, thus we discuss the development of relevant high‐throughput phenotyping approaches that will allow for more informed decision‐making regarding future crop improvement.

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Section: The Role Of Source–sink Dynamics and Carbohydrate Reserves In Heat Stress Responsesmentioning

confidence: 99%

The potential of resilient carbon dynamics for stabilizing crop reproductive development and productivity during heat stress

Ferguson

Tidy

Murchie

et al. 2021

Plant Cell & Environment

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“…Dry matter accumulation increased considerably with an increase in planting density (Table 3). The possible explanation for this increment is the increase in nitrogen application rate and planting density, which, consequently, promoted the growth of rice leaves, improved the leaf area index (Table 2), and provided more photosynthetic compounds for rice growth [45,51]. Cheng et al [52] reported that improved vegetative growth was reflected in a significant increase in dry matter accumulation.…”

Section: Effects Of Nitrogen Application Rate and Planting Density On...mentioning

confidence: 99%

High Sink Capacity Improves Rice Grain Yield by Promoting Nitrogen and Dry Matter Accumulation

et al. 2022

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Sink capacity, nitrogen (N), and dry matter accumulation (DMA) all play essential roles in promoting high rice grain yield, but their relationship is unclear. Here, a field experiment was conducted from 2020 to 2021 with Zhuangxiangyou Baijin 5 as the test cultivar. Two rates of N (T1 = 90 kg ha−1 N and T2 = 180 kg ha−1 N) and three transplanting densities (272,000 hills ha−1 (M1), 238,000 hills ha−1 (M2), and 206,000 hills ha−1 (M3)) were used to investigate rice grain yield and corresponding yield attributes. The results showed significant differences in rice yield, sink capacity, N and DMA, and the leaf area index (LAI) at the heading stage among the different treatments. The results showed that the output of T2M1 was the highest in 2020, increasing by 16.6% compared with the lowest output, while the output of T2M2 was the highest in 2021, increasing by 11.9% compared with the lowest output. During 2020, the highest sink capacity, LAI at the heading stage, and maximum dry matter accumulation at the maturity stage of rice were recorded in T2M1, while the highest N accumulation was recorded in T2M2. Furthermore, the sink capacity, as well as levels of N and DMA, of rice in 2020 was higher in T2M2, and the LAI was higher in T2M1 at the heading stage. Correlation analyses showed that yield was significantly positively correlated with N and DMA. In addition, a significant positive correlation between sink capacity and DMA was observed during both years, while a significant positive correlation between sink capacity and N accumulation was observed in 2021. Thus, we conclude that a high sink capacity can increase rice yield by increasing N and DMA because a high sink capacity is the internal driving force of high rice grain yield. In conclusion, the T2M1 regimen is a promising approach for improving the grain yield of paddy rice.

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“…In recent years, the XRD technology has been applied in starch research at home and abroad, especially in the studies on the industrial processing properties of starch [26][27][28][29][30][31][32][33][34] . The contents of amylose and amylopectin were the most important factors determining the cooking and eating quality.…”

Section: Relationship Between Starch Crystallinity and Amylose Contentmentioning

confidence: 99%

Formation Characteristics of Endosperm Structures in Different Rice Genotypes

Limin¹,

Li²,

Li-dong³

et al. 2020

Preprint

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To explore the formation characteristics of endosperm structures in different rice genotypes, indica, japonica and glutinous rice cultivars were used and grown in the paddy field. The endosperm structures in the grain during the filling period were investigated. The results showed that the compactness of amyloplast arrangement was positively correlated with grain filling percentage. The endosperm structure varied with the position within a grain. At maturity, the structure was the best in the back, the intermediate in the center, and the worst in the belly of a kernel. However, the filling was better in the center than in the back and in the belly from 5 to 10 days after flowering (DAF). The endosperm structure was different among genotypes. From 5 to 25 DAF, starch accumulation was the earliest in glutinous rice, followed by indica rice and japonica rice. Gaps and pores in endosperm were closely associated with rice transparency. The starch crystallinity in endosperm was negatively correlated with amylose content. Among the three genotypes, glutinous showed the highest crystallinity, followed by japonica and indica rice. The starch crystallinity in a grain was lower on a primary branch than that on a secondary branch. Among all grains, the second grain on a primary branch showed the lowest starch crystallinity. The results indicated that the starch structure of endosperm not only differ between rice genotypes, but also varies with the location of a grain on the panicle, and that it affects the grain-filling, transparency and amylose content of rice.

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Characterization and Grouping of All Primary Branches at Various Positions on a Rice Panicle Based on Grain Growth Dynamics

Cited by 11 publications

References 48 publications

The potential of resilient carbon dynamics for stabilizing crop reproductive development and productivity during heat stress

The potential of resilient carbon dynamics for stabilizing crop reproductive development and productivity during heat stress

High Sink Capacity Improves Rice Grain Yield by Promoting Nitrogen and Dry Matter Accumulation

Formation Characteristics of Endosperm Structures in Different Rice Genotypes

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