The coordinated increase in stomatal density and vein dimensions during genetic improvement in rice

Wu, Le; Boer, Hugo J. de; Zixiao, Zhang; Chen, Xueliang; Shi, Yuanhao; Peng, Shaobing; Wang, Fei

doi:10.1002/agj2.20180

Cited by 14 publications

(7 citation statements)

References 64 publications

(104 reference statements)

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“…Nevertheless, there was nearly no connection between SZ and SD in the present study (Figure 6B). This finding is the same as previous research, where SD and SZ showed no coincident trend during the breeding process of japonica rice varieties [66]. Although increasing g op within species is possible, by decreasing SZ and increasing SD, this trend may only apply to some species due to variations in the natural habit of species [52,53].…”

Section: Discussionsupporting

confidence: 91%

Blue-Light-Dependent Stomatal Density and Specific Leaf Weight Coordinate to Promote Gas Exchange of Soybean Leaves

et al. 2022

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Blue and red light are essential light signals used to regulate stomatal development and leaf structure. In the present study, stomatal and leaf traits that respond to blue and red light were studied at two light intensities (400 and 100 µmol m−2 s−1) in soybeans. The stomatal traits and leaf characteristics were determined. Furthermore, their contribution to the operational maximum stomatal conductance (gopmax) was evaluated using the rdacca.hp R package. With the light intensity significantly reduced, the stomatal size (SZ) under blue light did not change. Similarly, the decrease in light intensity did not influence the stomatal density (SD), specific leaf weight (SLW) or gopmax under red light. These results implied that the regulation of SD and SLW depended on blue light and that SZ was highly sensitive to red light. In addition, SLW was strongly correlated with SD. The SLW and SD had the highest contribution rates (19.43% and 19.5%, respectively) to gopmax, as compared with the other parameters. In conclusion, these results suggested that in long-term exposure to blue light, the enhancements in gopmax were primarily due to the synergistic promotion of SLW and SD.

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Section: Discussionsupporting

confidence: 91%

Blue-Light-Dependent Stomatal Density and Specific Leaf Weight Coordinate to Promote Gas Exchange of Soybean Leaves

et al. 2022

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“…Correlations between K leaf and VLA existing in cultivated but not wild rice genotypes illustrate the importance of leaf vein traits during rice domestication or genetic improvement. For example, Wu et al ( 2020 ) revealed that an increase in leaf vein dimensions during rice genetic improvement enhanced leaf gas exchange. In addition to leaf vein traits, leaf morphological traits associated with leaf gas exchange, such as stomatal density and stomatal size in rice, have also been improved during crop genetic improvement (Panda et al, 2018 ; Wu et al, 2020 ).…”

Section: Discussionmentioning

confidence: 99%

“…For example, Wu et al ( 2020 ) revealed that an increase in leaf vein dimensions during rice genetic improvement enhanced leaf gas exchange. In addition to leaf vein traits, leaf morphological traits associated with leaf gas exchange, such as stomatal density and stomatal size in rice, have also been improved during crop genetic improvement (Panda et al, 2018 ; Wu et al, 2020 ). There is a need for establishing the underlying morphological and physiological changes for crop improvement.…”

Section: Discussionmentioning

confidence: 99%

High Leaf Vein Density Promotes Leaf Gas Exchange by Enhancing Leaf Hydraulic Conductance in Oryza sativa L. Plants

Miao

Zhang

et al. 2021

Front. Plant Sci.

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Six cultivated rice genotypes showing different stomatal conductance (gs) values were used to investigate the influence of leaf vein traits on leaf gas exchange and leaf hydraulics. The results showed that gs was the main determinant of the varietal difference in the net photosynthetic rate (PN), whereas the area-based leaf nitrogen content (Narea) and mesophyll conductance (gm) were not main factors. gs and PN were both positively correlated with leaf hydraulic conductance (Kleaf). A high density of leaf veins (vein length per leaf area, VLA), especially minor leaf veins (VLAminor), was of benefit for improving the Kleaf. The proportion of the minor leaf vein length to the total leaf vein length did not impact the leaf hydraulics or leaf gas exchange. Overall, these findings suggested that a high density of leaf veins, especially minor leaf veins, enhances Kleaf and promotes gs and PN in cultivated rice genotypes and a high VLA can be regarded as a high photosynthetic capacity trait in rice plants.

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“…g s is mainly determined by stomatal size, stomatal density, stomatal distribution, and especially by stomatal aperture [34,35]. Large stomatal pores and stomatal apertures as well as high stomatal density were suggested to be of benefit for improving g s and A in species [36][37][38][39]. As an important determinant for g s , the stomatal aperture is greatly influenced by plant hydraulic status [40,41].…”

Section: Effects Of Stomatal Conductance On Leaf Net Photosynthetic Ratementioning

confidence: 99%

Physiological Factors Limiting Leaf Net Photosynthetic Rate in C3 Crops like Rice and Approaches for Improving It

Miao

Wang

et al. 2022

Agronomy

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Improving leaf photosynthetic capacity is one of the most promising approaches to further boost crop yield. Clarifying factors limiting leaf photosynthetic capacity, especially in C3 crops, is meaningful for designing strategies to improve it. Leaf net photosynthetic rate (A) is one of the parameters describing leaf photosynthetic capacity. In the present study, physiological factors limiting A in C3 crops such as rice were discussed and different approaches for A improvement were summarized to provide theoretical guidance for increasing leaf photosynthetic capacity. A will be limited by both CO2 availability and light intensity over periods from a few hours to several days, and by one of them over shorter intervals. Under current ambient atmospheric conditions, A of C3 crops is mainly limited by Rubisco activity and the CO2 concentration in chloroplasts. Leaf nitrogen content affects A by regulating Rubisco content and leaf anatomy; leaf morphological and anatomical traits limit A by impacting stomatal and mesophyll CO2 diffusion. Further improvements of A in C3 crops can be achieved by designing or introducing high-activity Rubisco; adjusting leaf nitrogen allocation to optimize leaf anatomy and leaf chemical composition; modifying leaf morphology and anatomy for greater CO2 diffusion; improving the activity of proteins and enzymes associated with sugar transportation and utilization; introducing C4 photosynthetic mechanisms and combining high photosynthetic traits by conventional breeding.

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The coordinated increase in stomatal density and vein dimensions during genetic improvement in rice

Cited by 14 publications

References 64 publications

Blue-Light-Dependent Stomatal Density and Specific Leaf Weight Coordinate to Promote Gas Exchange of Soybean Leaves

Blue-Light-Dependent Stomatal Density and Specific Leaf Weight Coordinate to Promote Gas Exchange of Soybean Leaves

High Leaf Vein Density Promotes Leaf Gas Exchange by Enhancing Leaf Hydraulic Conductance in Oryza sativa L. Plants

Physiological Factors Limiting Leaf Net Photosynthetic Rate in C3 Crops like Rice and Approaches for Improving It

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