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Labella R, Bochicchio R, Addesso R, Labella D, Franco A, Falabella P, Amato M. Germination Behavior and Geographical Information System-Based Phenotyping of Root Hairs to Evaluate the Effects of Different Sources of Black Soldier Fly ( Hermetia illucens) Larval Frass on Herbaceous Crops. PLANTS (BASEL, SWITZERLAND) 2024; 13:230. [PMID: 38256783 PMCID: PMC10819484 DOI: 10.3390/plants13020230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Revised: 01/08/2024] [Accepted: 01/10/2024] [Indexed: 01/24/2024]
Abstract
Insect larval frass has been proposed as a fertilizer and amendment, but methods for testing its effects on plants are poorly developed and need standardization. We obtained different types of black soldier fly (Hermetia illucens) frass via the factorial combination of (a) two insect diets, as follows: G (Gainesville = 50% wheat bran, 30% alfalfa meal, 20% maize meal) and W (43% sheep whey + 57% seeds); (b) two frass thermal treatments: NT = untreated and T = treated at 70 °C for 1 h. We tested the effects on the germination of cress (Lepidium sativum L.) and wheat (Triticum durum Desf.) by applying 1:2 w:w water extracts at 0, 25, 50, 75 and 100% concentration. Standardizing frass water content before extraction affected chemical composition. Frass extracts showed high electrical conductivity (8.88 to 13.78 mS cm-1). The W diet was suppressive towards Escherichia coli and showed a lower content of nitrates (e.g., WNT 40% lower than GNT) and a concentration-dependent phytotoxic effect on germinating plants. At 25% concentration, germination indices of G were 4.5 to 40-fold those at 100%. Root and shoot length and root hair area were affected by diet and concentration of frass extracts (e.g., root and shoot length in cress at 25% were, respectively, 4.53 and 2 times higher than at 100%), whereas the effects of the thermal treatment were few or inconclusive. On barley (Hordeum vulgare L.) grown in micropots on a silty loam soil, root mass was reduced by 37% at high extract concentration. A quick procedure for root hair surface area was developed based on the geographic information system (GIS) and may provide a fast method for incorporating root hair phenotyping in frass evaluation. The results indicate that below-ground structures need to be addressed in research on frass effects. For this, phyotoxicity tests should encompass different extract dilutions, and frass water content should be standardized before extraction in the direction of canonical procedures to allow comparisons.
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Affiliation(s)
- Rosanna Labella
- School of Agriculture, Forestry, Food and Environmental Sciences, University of Basilicata, 85100 Potenza, Italy; (R.L.); (D.L.)
| | - Rocco Bochicchio
- School of Agriculture, Forestry, Food and Environmental Sciences, University of Basilicata, 85100 Potenza, Italy; (R.L.); (D.L.)
| | - Rosangela Addesso
- Department of European and Mediterranean Cultures, Environment, and Cultural Heritage, University of Basilicata, 85100 Potenza, Italy;
| | - Donato Labella
- School of Agriculture, Forestry, Food and Environmental Sciences, University of Basilicata, 85100 Potenza, Italy; (R.L.); (D.L.)
| | - Antonio Franco
- Department of Science, University of Basilicata, 85100 Potenza, Italy; (A.F.); (P.F.)
- Spinoff XFlies s.r.l., University of Basilicata, 85100 Potenza, Italy
| | - Patrizia Falabella
- Department of Science, University of Basilicata, 85100 Potenza, Italy; (A.F.); (P.F.)
- Spinoff XFlies s.r.l., University of Basilicata, 85100 Potenza, Italy
| | - Mariana Amato
- School of Agriculture, Forestry, Food and Environmental Sciences, University of Basilicata, 85100 Potenza, Italy; (R.L.); (D.L.)
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Chen X, Tang Y, Duan Q, Hu J. Phenotypic quantification of root spatial distribution along circumferential direction for field paddy-wheat. PLoS One 2023; 18:e0279353. [PMID: 37418496 PMCID: PMC10328375 DOI: 10.1371/journal.pone.0279353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2022] [Accepted: 12/06/2022] [Indexed: 07/09/2023] Open
Abstract
Plant roots are essential for water and nutrient absorption, anchoring, mechanical support, metabolite storage and interaction with the surrounding soil environment. A comprehensive understanding of root traits provides an opportunity to build ideal roots architectural system that provides improved stability and yield advantage in adverse target environments caused by soil quality degradation, climate change, etc. However, we hypothesize that quantitative indicators characterizing root system are still need to be supplemented. Features describing root growth and distribution, until now, belong mostly to 2D indicators or reflect changes in the root system with a depth of soil layers but are rarely considered in a spatial region along the circumferential direction. We proposed five new indicators to quantify the dynamics of the root system architecture (RSA) along its eight-part circumferential orientations with visualization technology which consists of in-situ field root samplings, RSA digitization, and reconstruction according to previous research based on field experiments that conducted on paddy-wheat cultivation land with three fertilization rates. The experimental results showed that the growth space of paddy-wheat root is mainly restricted to a cylinder with a diameter of 180 mm and height of 200 mm at the seedlings stage. There were slow fluctuating trends in growth by the mean values of five new indicators within a single volume of soil. The fluctuation of five new indicators was indicated in each sampling time, which decreased gradually with time. Furthermore, treatment of N70 and N130 could similarly impact root spatial heterogeneity. Therefore, we concluded that the five new indicators could quantify the spatial dynamics of the root system of paddy-wheat at the seedling stage of cultivation. It is of great significance to the comprehensive quantification of crop roots in targeted breeding programs and the methods innovation of field crop root research.
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Affiliation(s)
- Xinxin Chen
- School of Agricultural Engineering, Jiangsu University, Zhenjiang, China
| | - Yongli Tang
- Nanjing Agricultural Equipment Extension Center, Nanjing, China
| | - Qingfei Duan
- College of Engineering, Nanjing Agricultural University, Nanjing, China
| | - Jianping Hu
- School of Agricultural Engineering, Jiangsu University, Zhenjiang, China
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Urfan M, Sharma S, Hakla HR, Rajput P, Andotra S, Lehana PK, Bhardwaj R, Khan MS, Das R, Kumar S, Pal S. Recent trends in root phenomics of plant systems with available methods- discrepancies and consonances. PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS : AN INTERNATIONAL JOURNAL OF FUNCTIONAL PLANT BIOLOGY 2022; 28:1311-1321. [PMID: 35910442 PMCID: PMC9334470 DOI: 10.1007/s12298-022-01209-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 07/02/2022] [Accepted: 07/12/2022] [Indexed: 06/03/2023]
Abstract
The phenotyping of plant roots is a challenging task and poses a major lacuna in plant root research. Roots rhizospheric zone is affected by several environmental cues among which salinity, drought, heavy metal and soil pH are key players. Among biological factors, fungal, nematode and bacterial interactions with roots are vital for improving nutrient uptake efficiency in plants. The subterranean nature of a plant root and the limited number of approaches for root phenotyping offers a great challenge to the plant breeders to select a desirable root trait under different stress conditions. Identification of key root traits can provide a basic understanding for generating crop plants with enhanced ability to withstand various biotic or abiotic stresses. For instance, crops with improved soil exploration potential, phosphate uptake efficiency, water use efficiency and others. Laboratory methods such as hydroponics, rhizotron, rhizoslide and luminescence observatory for roots do not provide precise and desired root quantification attributes. Though 3D imaging by X-ray computed tomography (X-ray-CT) and magnetic resonance imaging techniques are complex, however, it provides the most applicable and practically relevant data for quantifying root system architecture traits. This review outlines the current developments in root studies including recent approaches viz. X-ray-CT, MRI, thermal infrared imaging and minirhizotron. Although root phenotyping is a laborious procedure, it offers multiple advantages by removing discrepancies and providing the actual practical significance of plant roots for breeding programs.
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Affiliation(s)
- Mohammad Urfan
- Plant Physiology Laboratory, Department of Botany, University of Jammu, Jammu, 180006 India
| | - Shubham Sharma
- Plant Physiology Laboratory, Department of Botany, University of Jammu, Jammu, 180006 India
| | - Haroon Rashid Hakla
- Plant Physiology Laboratory, Department of Botany, University of Jammu, Jammu, 180006 India
| | - Prakriti Rajput
- Plant Physiology Laboratory, Department of Botany, University of Jammu, Jammu, 180006 India
| | - Sonali Andotra
- Plant Physiology Laboratory, Department of Botany, University of Jammu, Jammu, 180006 India
| | | | - Renu Bhardwaj
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, 143001 India
| | - M Suhail Khan
- USBT, Guru Gobind Singh Indraprastha University, Dwarka, 110 078 New Delhi India
| | - Ranjan Das
- Department of Crop Physiology, Assam Agricultural University, Jorhat, 785013 India
| | - Sunil Kumar
- Department of Statistics, University of Jammu, Jammu, 180006 India
| | - Sikander Pal
- Plant Physiology Laboratory, Department of Botany, University of Jammu, Jammu, 180006 India
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Non-Destructive Measurement of the Pumpkin Rootstock Root Phenotype Using AZURE KINECT. PLANTS 2022; 11:plants11091144. [PMID: 35567145 PMCID: PMC9100892 DOI: 10.3390/plants11091144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 04/09/2022] [Accepted: 04/21/2022] [Indexed: 11/17/2022]
Abstract
Rootstock grafting is an important method to improve the yield and quality of seedlings. Pumpkin is the rootstock of watermelon, melon, and cucumber, and the root phenotype of rootstock is an important reference for breeding. At present, the root phenotype is mainly measured by scanners, with which it is difficult to achieve non-destructive and in situ measurements. In this work, we propose a method for non-destructive measurement of the root phenotype on the surface layer of the root ball of pumpkin rootstock plug seedlings and an accurate estimation of the surface area, length, and volume of total root using an AZURE KINECT sensor. Firstly, the KINECT is used to capture four-view color and depth images of the root surface, and then multi-view images are spliced to obtain a complete image of the root surface. After preprocessing of the images, we extract the roots from the root ball. For root phenotype measurements, the surface areas of the surface roots and root ball are calculated, followed by calculating root encapsulation. Next, the non-overlapping roots in the surface root image are extracted, and the ratio of the surface area to the skeleton length is used as the average diameter of total root. Based on the high correlation between the surface area of surface root and the surface area of total root, a linear fitting model is established to estimate the surface area, length, and volume of total root. The experiment ultimately showed that the measurement error for the average diameter of total root is less than 30 μm, and consistency with the scanner is higher than 93.3%. The accuracy of the surface area of total root estimation was found to be more than 88.1%, and the accuracy of the root length of total root estimation was observed to be greater than 87.2%. The method proposed in this paper offers similar accuracy to a scanner, which meets the needs of non-destructive root phenotype research. This method is expected to replace root scanners for high-throughput phenotypic measurements and provides a new avenue for root phenotype measurements of pumpkin rootstocks. This technology will provide key basic data for evaluating the root growth of pumpkin rootstocks.
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Pongrac P, Castillo-Michel H, Reyes-Herrera J, Hancock RD, Fischer S, Kelemen M, Thompson JA, Wright G, Likar M, Broadley MR, Vavpetič P, Pelicon P, White PJ. Effect of phosphorus supply on root traits of two Brassica oleracea L. genotypes. BMC PLANT BIOLOGY 2020; 20:368. [PMID: 32758143 PMCID: PMC7404929 DOI: 10.1186/s12870-020-02558-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Accepted: 07/19/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Phosphorus (P) deficiency limits crop production worldwide. Crops differ in their ability to acquire and utilise the P available. The aim of this study was to determine root traits (root exudates, root system architecture (RSA), tissue-specific allocation of P, and gene expression in roots) that (a) play a role in P-use efficiency and (b) contribute to large shoot zinc (Zn) concentration in Brassica oleracea. RESULTS Two B. oleracea accessions (var. sabellica C6, a kale, and var. italica F103, a broccoli) were grown in a hydroponic system or in a high-throughput-root phenotyping (HTRP) system where they received Low P (0.025 mM) or High P (0.25 mM) supply for 2 weeks. In hydroponics, root and shoot P and Zn concentrations were measured, root exudates were profiled using both Fourier-Transform-Infrared spectroscopy and gas-chromatography-mass spectrometry and previously published RNAseq data from roots was re-examined. In HTRP experiments, RSA (main and lateral root number and lateral root length) was assessed and the tissue-specific distribution of P was determined using micro-particle-induced-X-ray emission. The C6 accession had greater root and shoot biomass than the F103 accession, but the latter had a larger shoot P concentration than the C6 accession, regardless of the P supply in the hydroponic system. The F103 accession had a larger shoot Zn concentration than the C6 accession in the High P treatment. Although the F103 accession had a larger number of lateral roots, which were also longer than in the C6 accession, the C6 accession released a larger quantity and number of polar compounds than the F103 accession. A larger number of P-responsive genes were found in the Low P treatment in roots of the F103 accession than in roots of the C6 accession. Expression of genes linked with "phosphate starvation" was up-regulated, while those linked with iron homeostasis were down-regulated in the Low P treatment. CONCLUSIONS The results illustrate large within-species variability in root acclimatory responses to P supply in the composition of root exudates, RSA and gene expression, but not in P distribution in root cross sections, enabling P sufficiency in the two B. oleracea accessions studied.
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Affiliation(s)
- Paula Pongrac
- Ecological Science Group, The James Hutton Institute, Invergowrie, Dundee, DD2 5DA, UK.
- Jožef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia.
| | | | | | - Robert D Hancock
- Cell and Molecular Sciences, The James Hutton Institute, Invergowrie, Dundee, DD2 5DA, UK
| | - Sina Fischer
- Future Food Beacon of Excellence and the School of Biosciences, University of Nottingham, Nottingham, LE12 5RD, UK
| | - Mitja Kelemen
- Jožef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia
- Jožef Stefan International Postgraduate School, Jamova 39, SI-1000, Ljubljana, Slovenia
| | - Jacqueline A Thompson
- Ecological Science Group, The James Hutton Institute, Invergowrie, Dundee, DD2 5DA, UK
| | - Gladys Wright
- Ecological Science Group, The James Hutton Institute, Invergowrie, Dundee, DD2 5DA, UK
| | - Matevž Likar
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000, Ljubljana, Slovenia
| | - Martin R Broadley
- Plant and Crop Sciences Division, University of Nottingham, Loughborough, LE12 5RD, UK
| | - Primož Vavpetič
- Jožef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia
| | - Primož Pelicon
- Jožef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia
| | - Philip J White
- Ecological Science Group, The James Hutton Institute, Invergowrie, Dundee, DD2 5DA, UK
- Distinguished Scientist Fellowship Program, King Saud University, Riyadh, 11451, Saudi Arabia
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China
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Grzesiak MT, Hordyńska N, Maksymowicz A, Grzesiak S, Szechyńska-Hebda M. Variation Among Spring Wheat ( Triticum aestivum L.) Genotypes in Response to the Drought Stress. II-Root System Structure. PLANTS (BASEL, SWITZERLAND) 2019; 8:E584. [PMID: 31817986 PMCID: PMC6963452 DOI: 10.3390/plants8120584] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/13/2019] [Revised: 11/30/2019] [Accepted: 12/03/2019] [Indexed: 01/27/2023]
Abstract
(1) Background: The study analyzed wheat morphological traits to assess the role of roots structure in the tolerance of drought and to recognize the mechanisms of root structure adjustment to dry soil environment. (2) Methods: Root-box and root-basket methods were applied to maintain an intact root system for analysis. (3) Results: Phenotypic differences among six genotypes with variable drought susceptibility index were found. Under drought, the resistant genotypes lowered their shoot-to-root ratio. Dry matter, number, length, and diameter of nodal and lateral roots were higher in drought-tolerant genotypes than in sensitive ones. The differences in the surface area of the roots were greater in the upper parts of the root system (in the soil layer between 0 and 15 cm) and resulted from the growth of roots of the tolerant plant at an angle of 0-30° and 30-60°. (4) Conclusions: Regulation of root bending in a more downward direction can be important but is not a priority in avoiding drought effects by tolerant plants. If this trait is reduced and accompanied by restricted root development in the upper part of the soil, it becomes a critical factor promoting plant sensitivity to water-limiting conditions.
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Affiliation(s)
- Maciej T. Grzesiak
- F. Górski Institute of Plant Physiology, Polish Academy of Sciences, Niezpominajek 21, 30-239, Kraków, Poland; (N.H.); (A.M.); (S.G.)
| | - Natalia Hordyńska
- F. Górski Institute of Plant Physiology, Polish Academy of Sciences, Niezpominajek 21, 30-239, Kraków, Poland; (N.H.); (A.M.); (S.G.)
| | - Anna Maksymowicz
- F. Górski Institute of Plant Physiology, Polish Academy of Sciences, Niezpominajek 21, 30-239, Kraków, Poland; (N.H.); (A.M.); (S.G.)
| | - Stanisław Grzesiak
- F. Górski Institute of Plant Physiology, Polish Academy of Sciences, Niezpominajek 21, 30-239, Kraków, Poland; (N.H.); (A.M.); (S.G.)
| | - Magdalena Szechyńska-Hebda
- F. Górski Institute of Plant Physiology, Polish Academy of Sciences, Niezpominajek 21, 30-239, Kraków, Poland; (N.H.); (A.M.); (S.G.)
- Plant Breeding and Acclimation Institute-National Research Institute, 05-870 Błonie, Radzików, Poland
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Grzesiak MT, Hordyńska N, Maksymowicz A, Grzesiak S, Szechyńska-Hebda M. Variation Among Spring Wheat ( Triticum aestivum L.) Genotypes in Response to the Drought Stress. II-Root System Structure. PLANTS (BASEL, SWITZERLAND) 2019; 8:plants8120584. [PMID: 31817986 DOI: 10.1080/17429145.2018.1550817] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2019] [Revised: 11/30/2019] [Accepted: 12/03/2019] [Indexed: 05/27/2023]
Abstract
(1) Background: The study analyzed wheat morphological traits to assess the role of roots structure in the tolerance of drought and to recognize the mechanisms of root structure adjustment to dry soil environment. (2) Methods: Root-box and root-basket methods were applied to maintain an intact root system for analysis. (3) Results: Phenotypic differences among six genotypes with variable drought susceptibility index were found. Under drought, the resistant genotypes lowered their shoot-to-root ratio. Dry matter, number, length, and diameter of nodal and lateral roots were higher in drought-tolerant genotypes than in sensitive ones. The differences in the surface area of the roots were greater in the upper parts of the root system (in the soil layer between 0 and 15 cm) and resulted from the growth of roots of the tolerant plant at an angle of 0-30° and 30-60°. (4) Conclusions: Regulation of root bending in a more downward direction can be important but is not a priority in avoiding drought effects by tolerant plants. If this trait is reduced and accompanied by restricted root development in the upper part of the soil, it becomes a critical factor promoting plant sensitivity to water-limiting conditions.
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Affiliation(s)
- Maciej T Grzesiak
- F. Górski Institute of Plant Physiology, Polish Academy of Sciences, Niezpominajek 21, 30-239, Kraków, Poland
| | - Natalia Hordyńska
- F. Górski Institute of Plant Physiology, Polish Academy of Sciences, Niezpominajek 21, 30-239, Kraków, Poland
| | - Anna Maksymowicz
- F. Górski Institute of Plant Physiology, Polish Academy of Sciences, Niezpominajek 21, 30-239, Kraków, Poland
| | - Stanisław Grzesiak
- F. Górski Institute of Plant Physiology, Polish Academy of Sciences, Niezpominajek 21, 30-239, Kraków, Poland
| | - Magdalena Szechyńska-Hebda
- F. Górski Institute of Plant Physiology, Polish Academy of Sciences, Niezpominajek 21, 30-239, Kraków, Poland
- Plant Breeding and Acclimation Institute-National Research Institute, 05-870 Błonie, Radzików, Poland
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Lu W, Li Y, Deng Y. Root phenotypic detection of different vigorous maize seeds based on Progressive Corrosion Joining algorithm of image. PLANT METHODS 2019; 15:137. [PMID: 31832079 PMCID: PMC6859636 DOI: 10.1186/s13007-019-0518-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Accepted: 11/07/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND The root phenotypes of different vigorous maize seeds vary a lot. Imaging roots of growing maize is a non-invasive, affordable and high throughput approach. However, it's difficult to get integral root images because of the block of the soil. The paper proposed an algorithm to repair incomplete root images for maize root fast non-invasive phenotyping detection. RESULTS A two-layer transparent stress growth device with two concentric cylinders was developed as mesocosms and the maize seeds were planted in the annulus of it. The maize roots grow in soil against two acrylic plastic surfaces due to the press of the small growing area to acquire more root details during roots visualization and imaging. Even though, parts of the roots are occluded which means that it's tough to extract the information of root general physical construction. For recovering gaps from disconnected root segments, Progressive Corrosion Joining (PCJ) algorithm was proposed based on the physiological characteristics of hydrotropism, geostrophic and continuity with three steps which are root image thinning, progressive corrosion and joining processing respectively. The experiments indicate that maize phenotyping parameters are negative correlation with seed aging days. And specifically, Root Number (RTN), Root Length (RTL), Root Width (RTW) and Root Extension Length (REL) of unaged and 14-day-aged maize seeds are decreased from 15.40, 82.40 mm, 1.53 mm and 82.20 mm to 4.58, 38.6 mm, 1.35 mm and 55.20 mm, and the growing speed of them are changed from 1.68 per day, 8.80 mm/d, 0.06 mm/d, 9.0 mm/d to 0.70 per day, 4.3 mm/d, 0.05 mm/d and 5.70 mm/d respectively. Whereas Root Extension Angle (REA) is basically irrelevant with the level of maize seed aging. CONCLUSION The developed double-layer Annular Root Phenotyping Container (ARPC) can satisfy the general physical construction of maize as well as push each root growing along the inner wall of the container which help to acquire more root information. The presented novel PCJ algorithm can recover the missing parts, even for big gaps, of maize roots effectively according to root morphological properties. The experiments show that the proposed method can be applied to evaluate the vigor of maize seeds which has vast application prospect in high throughput root phenotyping area.
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Affiliation(s)
- Wei Lu
- College of Engineering, Nanjing Agricultural University, Nanjing, 210031 China
| | - Ye Li
- College of Engineering, Nanjing Agricultural University, Nanjing, 210031 China
- Robot Sensor and Control Technology Laboratory, Nanjing, 210031 China
| | - Yiming Deng
- NDE Laboratory, Electrical and Computer Engineering, Michigan State University, East Lansing, 48824 USA
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