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

Miao, Yi; Wu, Mangang; Zhang, Hao; Zhang, Zuolin; Zhang, Zujian

doi:10.3389/fpls.2021.693815

Cited by 13 publications

(6 citation statements)

References 52 publications

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“…Leaf width and length were measured in vivo , and the stained leaf sections were used for major veins and minor veins counting. Vein density or vein length per leaf area (VLA) was calculated as follows ( Ye et al., 2021 ).…”

Section: Methodsmentioning

confidence: 99%

“…Recently, leaf venation architecture in rice has been focused on as one of the important leaf anatomical characteristics influencing leaf gas exchange and hydraulic conductance. Vein density and size were positively correlated with leaf hydraulic conductance thus improving leaf CO 2 assimilation efficiency which is vital for improving photosynthesis ( Tabassum et al., 2016 ; Pitaloka et al., 2021 ; Ye et al., 2021 ). Rice leaf veins are different in size and functions and, apart from the midrib, are divided into two categories (major and minor veins) based on their size.…”

Section: Introductionmentioning

confidence: 99%

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Multi-model genome-wide association studies of leaf anatomical traits and vein architecture in rice

et al. 2023

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IntroductionThe anatomy of rice leaves is closely related to photosynthesis and grain yield. Therefore, exploring insight into the quantitative trait loci (QTLs) and alleles related to rice flag leaf anatomical and vein traits is vital for rice improvement.MethodsHere, we aimed to explore the genetic architecture of eight flag leaf traits using one single-locus model; mixed-linear model (MLM), and two multi-locus models; fixed and random model circulating probability unification (FarmCPU) and Bayesian information and linkage disequilibrium iteratively nested keyway (BLINK). We performed multi-model GWAS using 329 rice accessions of RDP1 with 700K single-nucleotide polymorphisms (SNPs) markers.ResultsThe phenotypic correlation results indicated that rice flag leaf thickness was strongly correlated with leaf mesophyll cells layer (ML) and thickness of both major and minor veins. All three models were able to identify several significant loci associated with the traits. MLM identified three non-synonymous SNPs near NARROW LEAF 1 (NAL1) in association with ML and the distance between minor veins (IVD) traits.DiscussionSeveral numbers of significant SNPs associated with known gene function in leaf development and yield traits were detected by multi-model GWAS performed in this study. Our findings indicate that flag leaf traits could be improved via molecular breeding and can be one of the targets in high-yield rice development.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multi-model genome-wide association studies of leaf anatomical traits and vein architecture in rice

et al. 2023

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“…As leaf hydraulic resistance accounts for greater than one-quarter of whole-plant hydraulic resistance [43,44], leaf hydraulic conductance (K leaf ), the reciprocal of leaf hydraulic resistance, determines leaf gas exchange parameters greatly [40,45,46]. In higher plants, water from the stem moves into the petiole through the xylem in different vein orders, then passes through the bundle sheath and the mesophyll tissue before evaporating into the IAS and diffusing out of the leaf from the stomatal pores [47,48].…”

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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“…Leaf veins provide mechanical support and are at the forefront of nutrient and water transport in photosynthesis and transpiration [1,2]. Leaf veins consist of the xylem, phloem, and cambium, which are highly organized within the vascular bundle.…”

Section: Introductionmentioning

confidence: 99%

HD-Zip III Gene Family: Identification and Expression Profiles during Leaf Vein Development in Soybean

Gao

Chen

Feng

et al. 2022

Plants

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Leaf veins constitute the transport network for water and photosynthetic assimilates in vascular plants. The class III homeodomain-leucine zipper (HD-Zip III) gene family is central to the regulation of vascular development. In this research, we performed an overall analysis of the HD-Zip III genes in soybean (Glycine max L. Merr.). Our analysis included the phylogeny, conservation domains and cis-elements in the promoters of these genes. We used the quantitative reverse transcription-polymerase chain reaction to characterize the expression patterns of HD-Zip III genes in leaf vein development and analyze the effects of exogenous hormone treatments. In this study, twelve HD-Zip III genes were identified from the soybean genome and named. All soybean HD-Zip III proteins contained four highly conserved domains. GmHB15-L-1 transcripts showed steadily increasing accumulation during all stages of leaf vein development and were highly expressed in cambium cells. GmREV-L-1 and GmHB14-L-2 had nearly identical expression patterns in soybean leaf vein tissues. GmREV-L-1 and GmHB14-L-2 transcripts remained at stable high levels at all xylem developmental stages. GmREV-L-1 and GmHB14-L-2 were expressed at high levels in the vascular cambium and xylem cells. Overall, GmHB15-L-1 may be an essential regulator that is responsible for the formation or maintenance of soybean vein cambial cells. GmREV-L-1 and GmHB14-L-2 were correlated with xylem differentiation in soybean leaf veins. This study will pave the way for identifying the molecular mechanism of leaf vein development.

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

Cited by 13 publications

References 52 publications

Multi-model genome-wide association studies of leaf anatomical traits and vein architecture in rice

Multi-model genome-wide association studies of leaf anatomical traits and vein architecture in rice

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

HD-Zip III Gene Family: Identification and Expression Profiles during Leaf Vein Development in Soybean

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