Effects of root morphology and physiology on the formation and regulation of large panicles in rice

Liu, Kun; Li, Tingting; Chen, Yun; Huang, Jian; Qiu, Yuanyuan; Li, Siyu; Wang, Hao; Zhu, An; Zhuo, Xinxin; Feng, Yu; Zhang, Hao; Gu, Junfei; Liu, Lijun; Yang, Jie

doi:10.1016/j.fcr.2020.107946

Cited by 35 publications

(28 citation statements)

References 45 publications

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“…The total root length (TRL) was determined from scans using a ScanMaker i800 scanner and analyzed using the LA‐S Root Analysis System (Wanshen, Hangzhou, China). TRAA (total root absorbing area) and AAA (active absorbing area) was determined using the methylene blue staining (Leagene, Beijing, China) according to manufacturer's instructions with three replicates of 10 seedlings (Liu et al, 2014, 2020).…”

Section: Methodsmentioning

confidence: 99%

OsRLR4 binds to the OsAUX1 promoter to negatively regulate primary root development in rice

Sun

Gao

et al. 2022

JIPB

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Root architecture is one of the most important agronomic traits that determines rice crop yield. The primary root (PR) absorbs mineral nutrients and provides mechanical support; however, the molecular mechanisms of PR elongation remain unclear in rice. Here, the two loss‐of‐function T‐DNA insertion mutants of root length regulator 4 (OsRLR4), osrlr4‐1 and osrlr4‐2 with longer PR, and three OsRLR4 overexpression lines, OE‐OsRLR4‐1/‐2/‐3 with shorter PR compared to the wild type/Hwayoung (WT/HY), were identified. OsRLR4 is one of five members of the PRAF subfamily of the regulator chromosome condensation 1 (RCC1) family. Phylogenetic analysis of OsRLR4 from wild and cultivated rice indicated that it is under selective sweeps, suggesting its potential role in domestication. OsRLR4 controls PR development by regulating auxin accumulation in the PR tip and thus the root apical meristem activity. A series of biochemical and genetic analyses demonstrated that OsRLR4 functions directly upstream of the auxin transporter OsAUX1. Moreover, OsRLR4 interacts with the TRITHORAX‐like protein OsTrx1 to promote H3K4me3 deposition at the OsAUX1 promoter, thus altering its transcription level. This work provides insight into the cooperation of auxin and epigenetic modifications in regulating root architecture and provides a genetic resource for plant architecture breeding.

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Section: Methodsmentioning

confidence: 99%

OsRLR4 binds to the OsAUX1 promoter to negatively regulate primary root development in rice

Sun

Gao

et al. 2022

JIPB

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“…The yield of indica-japonica hybrid rice is considerably higher than that of indica hybrid rice (Table 1 ). The principal advantage of the former is the production large panicles under high biomass 23 , which was correlated with the grain yield among the four treatments applied to YY1540 24 . In the present study, the release cycle of the controlled-release fertilizer was about 120 days, Correlation analysis showed that dry matter accumulation and nitrogen uptake from the panicle initiation stage to the heading stage was correlated with spikelet number per panicle in YY1540 (Table 6 ), which suggested that the slow release of nitrogen by the controlled-release fertilizer did not meet the nitrogen demand of Indica–Japonica hybrid rice The productivity advantage of indica – japonica hybrid rice is dependent on the development of large panicles through enhanced by the spikelet differentiation, which may be associated with the cytokine in synthesis 25 , 26 .…”

Section: Discussionmentioning

confidence: 96%

The nitrogen topdressing mode of indica-japonica and indica hybrid rice are different after side-deep fertilization with machine transplanting

Wang

Zhang

et al. 2021

Sci Rep

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Determination of the optimal fertilization method is crucial to maximize nitrogen use efficiency and yield of different rice cultivars. Side-deep fertilization with controlled-release nitrogen, in conjunction with machine transplanting and subsequent topdressing, was applied to Indica–japonica hybrid rice ‘Yongyou1540’ (YY1540) and indica hybrid rice ‘Tianyouhuazhan’ (TYHZ). Four nitrogen treatments were applied in 2018 and 2019: traditional nitrogen application with quick-release nitrogen (T1), single-dose deep fertilization at transplanting with 100% controlled-release nitrogen (T2), and deep fertilization of 70% controlled-release nitrogen and topdressing of 30% quick nitrogen at tillering (T3), or at panicle initiation (T4). Side-deep fertilization reduced the fertilizer application frequency without causing yield loss, T4 enhanced the yield of YY1540 by increasing the number of productive tillers and number of spikelets per panicle compared with T1, T2 and T3. The yield of TYHZ showed no significant difference among treatments. The T4 treatment decreased the number of tillers at the tilling peak stage and increased the percentage productive tillers and number of differentiated spikelets. Compared with the other treatments, T4 increased dry matter accumulation and leaf area index during panicle initiation and grain ripening, and contributed to enhanced nitrogen uptake and nitrogen utilization in YY1540. On average, nitrogen uptake and utilization in YY1540 were highest in T4, but no significant differences among treatments were observed in TYHZ. Dry matter accumulation and nitrogen uptake from panicle initiation to heading of YY1540 were correlated with number of spikelets per panicle, but no significant correlations were observed for TYHZ. Supplementary topdressing with quick-release nitrogen at the panicle initiation stage was required to increase yield of indica–japonica hybrid rice, whereas single-dose deep fertilization with controlled-release nitrogen is satisfactory for the indica hybrid cultivar.

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“…(2009), and K. Liu et al. (2020) found a significant or extremely significant positive correlation among rice root number, root length, root surface area, root volume, root activity, root injury flow, and grain yield. W. Zhang et al.…”

Section: Discussionmentioning

confidence: 98%

Effects of continuous cropping on soil, senescence, and yield of Tartary buckwheat

Guo

et al. 2021

Agronomy Journal

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The yield of Tartary buckwheat (Fagopyrum tataricum Gaertn) is significantly affected by continuous cropping. This study aimed to clarify the effects of continuous cropping on the growth and yield formation of Tartary buckwheat. Tartary buckwheat cultivar Jinqiao was used as the experimental material to study the effects of different continuous cropping years on the rhizosphere soil, root morphology and physiology, senescence, and yield of Tartary buckwheat. Available nutrients, number of actinomycetes, soil enzyme activities, and contents of total chlorophyll and soluble protein in the leaves of Tartary buckwheat continuously decreased with an increase in continuous cropping years. However, the pH and number of fungi showed a continuous increasing trend. The number of bacteria in rhizosphere soil, root morphological indexes and root activity, and oxidase activity of the leaves initially increased and then decreased. Compared with that of the control, the yield of Tartary buckwheat significantly reduced by 6.36, 24.85, 78.62, and 83.10% with 1, 2, 3, and 4 yr of continuous cropping, respectively. Therefore, continuous cropping reduces the yield of Tartary buckwheat by destroying the microenvironment system of rhizosphere soil, inhibiting the growth and development of the root and shoot systems, and accelerating senescence. INTRODUCTIONBuckwheat (Fagopyrum spp.) is widely distributed worldwide and mainly cultivated in Russia, China, Ukraine, France, Kazakhstan, Poland, and Japan (Takuya et al., 2019;. Common buckwheat (Fagopyrum esculentum Moench) and Tartary buckwheat (F. tataricum Gaertn) are the two main cultivated species of buckwheat (Y. Zhang et al., 2020). With a long history of cultivation, China gradually formed the northern planting area of common buckwheat represented by Inner Mongolia,

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Effects of root morphology and physiology on the formation and regulation of large panicles in rice

Cited by 35 publications

References 45 publications

OsRLR4 binds to the OsAUX1 promoter to negatively regulate primary root development in rice

OsRLR4 binds to the OsAUX1 promoter to negatively regulate primary root development in rice

The nitrogen topdressing mode of indica-japonica and indica hybrid rice are different after side-deep fertilization with machine transplanting

Effects of continuous cropping on soil, senescence, and yield of Tartary buckwheat

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