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Gunaseelan K, Schröder R, Rebstock R, Ninan AS, Deng C, Khanal BP, Favre L, Tomes S, Dragulescu MA, O'Donoghue EM, Hallett IC, Schaffer RJ, Knoche M, Brummell DA, Atkinson RG. Constitutive expression of apple endo-POLYGALACTURONASE1 in fruit induces early maturation, alters skin structure and accelerates softening. Plant J 2024; 117:1413-1431. [PMID: 38038980 DOI: 10.1111/tpj.16571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 10/25/2023] [Accepted: 11/20/2023] [Indexed: 12/02/2023]
Abstract
During fruit ripening, polygalacturonases (PGs) are key contributors to the softening process in many species. Apple is a crisp fruit that normally exhibits only minor changes to cell walls and limited fruit softening. Here, we explore the effects of PG overexpression during fruit development using transgenic apple lines overexpressing the ripening-related endo-POLYGALACTURONASE1 gene. MdPG1-overexpressing (PGox) fruit displayed early maturation/ripening with black seeds, conversion of starch to sugars and ethylene production occurring by 80 days after pollination (DAP). PGox fruit exhibited a striking, white-skinned phenotype that was evident from 60 DAP and most likely resulted from increased air spaces and separation of cells in the hypodermis due to degradation of the middle lamellae. Irregularities in the integrity of the epidermis and cuticle were also observed. By 120 DAP, PGox fruit cracked and showed lenticel-associated russeting. Increased cuticular permeability was associated with microcracks in the cuticle around lenticels and was correlated with reduced cortical firmness at all time points and extensive post-harvest water loss from the fruit, resulting in premature shrivelling. Transcriptomic analysis suggested that early maturation was associated with upregulation of genes involved in stress responses, and overexpression of MdPG1 also altered the expression of genes involved in cell wall metabolism (e.g. β-galactosidase, MD15G1221000) and ethylene biosynthesis (e.g. ACC synthase, MD14G1111500). The results show that upregulation of PG not only has dramatic effects on the structure of the fruit outer cell layers, indirectly affecting water status and turgor, but also has unexpected consequences for fruit development.
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Affiliation(s)
- Kularajathevan Gunaseelan
- The New Zealand Institute for Plant and Food Research Limited (Plant and Food Research), Mount Albert Research Centre, Private Bag 92169, Auckland, 1142, New Zealand
| | - Roswitha Schröder
- The New Zealand Institute for Plant and Food Research Limited (Plant and Food Research), Mount Albert Research Centre, Private Bag 92169, Auckland, 1142, New Zealand
| | - Ria Rebstock
- The New Zealand Institute for Plant and Food Research Limited (Plant and Food Research), Mount Albert Research Centre, Private Bag 92169, Auckland, 1142, New Zealand
| | - Annu S Ninan
- The New Zealand Institute for Plant and Food Research Limited (Plant and Food Research), Mount Albert Research Centre, Private Bag 92169, Auckland, 1142, New Zealand
| | - Cecilia Deng
- The New Zealand Institute for Plant and Food Research Limited (Plant and Food Research), Mount Albert Research Centre, Private Bag 92169, Auckland, 1142, New Zealand
| | - Bishnu P Khanal
- Institute for Horticultural Production Systems, Leibniz-University Hannover, Herrenhäuser Straße 2, 30419, Hannover, Germany
| | - Laurie Favre
- Plant and Food Research, Private Bag 11600, Palmerston North, 4442, New Zealand
| | - Sumathi Tomes
- The New Zealand Institute for Plant and Food Research Limited (Plant and Food Research), Mount Albert Research Centre, Private Bag 92169, Auckland, 1142, New Zealand
| | - Monica A Dragulescu
- The New Zealand Institute for Plant and Food Research Limited (Plant and Food Research), Mount Albert Research Centre, Private Bag 92169, Auckland, 1142, New Zealand
| | - Erin M O'Donoghue
- Plant and Food Research, Private Bag 11600, Palmerston North, 4442, New Zealand
| | - Ian C Hallett
- The New Zealand Institute for Plant and Food Research Limited (Plant and Food Research), Mount Albert Research Centre, Private Bag 92169, Auckland, 1142, New Zealand
| | | | - Moritz Knoche
- Institute for Horticultural Production Systems, Leibniz-University Hannover, Herrenhäuser Straße 2, 30419, Hannover, Germany
| | - David A Brummell
- Plant and Food Research, Private Bag 11600, Palmerston North, 4442, New Zealand
| | - Ross G Atkinson
- The New Zealand Institute for Plant and Food Research Limited (Plant and Food Research), Mount Albert Research Centre, Private Bag 92169, Auckland, 1142, New Zealand
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2
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Tomes S, Gunaseelan K, Dragulescu M, Wang YY, Guo L, Schaffer RJ, Varkonyi-Gasic E. A MADS-box gene-induced early flowering pear ( Pyrus communis L.) for accelerated pear breeding. Front Plant Sci 2023; 14:1235963. [PMID: 37818320 PMCID: PMC10560987 DOI: 10.3389/fpls.2023.1235963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Accepted: 08/28/2023] [Indexed: 10/12/2023]
Abstract
There have been a considerable number of studies that have successfully sped up the flowering cycle in woody perennial horticultural species. One particularly successful study in apple (Malus domestica) accelerated flowering using a silver birch (Betula pendula) APETALA1/FRUITFULL MADS-box gene BpMADS4, which yielded a good balance of vegetative growth to support subsequent flower and fruit development. In this study, BpMADS4 was constitutively expressed in European pear (Pyrus communis) to establish whether this could be used as a tool in a rapid pear breeding program. Transformed pear lines flowered within 6-18 months after grafting onto a quince (Cydonia oblonga) rootstock. Unlike the spindly habit of early flowering apples, the early flowering pear lines displayed a normal tree-like habit. Like apple, the flower appearance was normal, and the flowers were fertile, producing fruit and seed upon pollination. Seed from these transformed lines were germinated and 50% of the progeny flowered within 3 months of sowing, demonstrating a use for these in a fast breeding program.
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Affiliation(s)
- Sumathi Tomes
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Auckland, New Zealand
| | | | - Monica Dragulescu
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Auckland, New Zealand
| | - Yen-Yi Wang
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Auckland, New Zealand
| | - Lindy Guo
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Auckland, New Zealand
| | - Robert J. Schaffer
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Motueka, New Zealand
- School of Biological Sciences, The University of Auckland, Auckland, New Zealand
| | - Erika Varkonyi-Gasic
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Auckland, New Zealand
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Nath A, Mathur P, Sudarshan K, Kaur Rajput G, Mascarenhas L, Arora RS, Seth R, Kumar Dixit S, Chinnaswamy G, Banipal RPS, Bhutia TW, Kumar Bodal V, Budukh A, Kumar Chaudhary N, Vijay C, Shikha Das D, Gundeti S, Harris C, Hazarika M, Natha Jondhale S, Gunaseelan K, Khamo V, Konjengbam R, Kumar A, Saroj Kumar DM, Majumdar G, Malik S, Mandal S, Najmi AM, Mohan Kumar C, Kumar Pandey A, Pandya S, Pareek P, Pautu JL, Surya Rao V, Ramesh C, Rawal M, Radhakrishnan N, Radhakrishnan V, Shah A, Singh S, Singh V, Singh P, Sundriyal D, Swaminathan R, Avinash T, Priya Kumari T, Tawsik S, Tiwari L. An assessment of childhood cancer care services in India - gaps, challenges and the way forward. Lancet Reg Health Southeast Asia 2023; 16:100235. [PMID: 37694177 PMCID: PMC10485780 DOI: 10.1016/j.lansea.2023.100235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 05/03/2023] [Accepted: 05/25/2023] [Indexed: 09/12/2023]
Abstract
Background Childhood cancers are emerging as an essential concern in India where there is lack of a specific programme component or policy to address childhood cancer control. There is limited information on the status and quality of childhood cancer care services in India. This paper describes the childhood cancer care services available at secondary and tertiary-level hospitals in India through a cross sectional study design. Methods The survey was conducted in 137 tertiary-level and 92 secondary-level hospitals in 26 states and 4 Union Territories (UTs), ensuring a uniform representation of public and private care hospitals. The study tool collected data on the organisational infrastructure, type of oncology services, health workforce, equipment, treatment and referral protocols, and treatment guidelines. Descriptive statistics was used to primarily present the health service status and data on childhood cancer care services in proportions and mean. Findings A dedicated pediatric oncology department was available in 41.6% of the public, 48.6% of private, and 64% Non Government Organization (NGO) managed tertiary-level hospitals. In 36 (39%) of the 92 hospitals providing secondary care, childhood cancer care was provided. The availability of bone (41.5%) and positron emission tomography (PET) scans (25.9%) was lower in public tertiary hospitals, whereas histopathology, computerised tomography (CT scan), and magnetic resonance imaging (MRI) were lower in public secondary hospitals than private and NGO managed hospitals for the corresponding level of care. Most tertiary hospitals had the required supportive care facilities except for play therapy and hospice care. Less than 50% of the public tertiary hospitals had stocks of the four categories of cancer-treating drugs and essential infrastructure for radiotherapy and chemotherapy. Most secondary-level hospitals not treating childhood cancer had referral linkages with tertiary hospitals. Interpretation The situational analysis of childhood cancer care services in India showed the concentration of availability of childhood cancer care services at the tertiary level of health care. There were gaps in the availability of specialised pediatric oncology care in all the tertiary hospitals. The availability of childhood cancer care services was higher in private and NGO-managed hospitals than in public hospitals. Integration of childhood cancer as a part of the national cancer control response should be taken up as a matter of priority. The need of the hour is to formulate a childhood cancer policy that will enable timely access to care universally. Funding World Health Organization, India provided funding and technical support.
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Affiliation(s)
- Anita Nath
- ICMR-National Centre for Disease Informatics and Research, Indian Council of Medical Research, Bengaluru, Karnataka, India
| | - Prashant Mathur
- ICMR-National Centre for Disease Informatics and Research, Indian Council of Medical Research, Bengaluru, Karnataka, India
| | - K.L. Sudarshan
- ICMR-National Centre for Disease Informatics and Research, Indian Council of Medical Research, Bengaluru, Karnataka, India
| | - Gurpreet Kaur Rajput
- ICMR-National Centre for Disease Informatics and Research, Indian Council of Medical Research, Bengaluru, Karnataka, India
| | - Leena Mascarenhas
- ICMR-National Centre for Disease Informatics and Research, Indian Council of Medical Research, Bengaluru, Karnataka, India
| | | | - Rachna Seth
- All India Institute of Medical Sciences, New Delhi, India
| | | | | | | | - Tseten W. Bhutia
- Sir Thutob Namgyal Memorial Referral Hospital, Gangtok, Sikkim, India
| | | | - Atul Budukh
- Centre for Cancer Epidemiology (CCE), Tata Memorial Centre (TMC), Homi Bhabha National Institute (HBNI), Mumbai, India
| | | | - C.R. Vijay
- Kidwai Memorial Institute of Oncology, Bengaluru, Karnataka, India
| | | | | | - Caleb Harris
- North Eastern Indira Gandhi Regional Institute of Health and Medical Sciences, Shillong, Meghalaya, India
| | | | | | - K. Gunaseelan
- Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | | | | | - Arun Kumar
- Kidwai Memorial Institute of Oncology, Bengaluru, Karnataka, India
| | | | | | - Shikha Malik
- All India Institute of Medical Sciences, Bhopal, Madhya Pradesh, India
| | | | - Arshad Manzoor Najmi
- Sher-I-Kashmir Institute of Medical Sciences, Srinagar, Jammu and Kashmir, India
| | | | | | - Shashank Pandya
- The Gujarat Cancer & Research Institute, Ahmedabad, Gujarat, India
| | - Puneet Pareek
- All India Institute of Medical Sciences, Jodhpur, Rajasthan, India
| | | | - V. Surya Rao
- Andhra Medical College, Visakhapatnam, Andhra Pradesh, India
| | - C. Ramesh
- Kidwai Memorial Institute of Oncology, Bengaluru, Karnataka, India
| | - Manoj Rawal
- BPS Government Medical College for Women, Haryana, India
| | | | | | - Anand Shah
- The Gujarat Cancer & Research Institute, Ahmedabad, Gujarat, India
| | - S.B. Singh
- Rajendra Institute of Medical Sciences, Ranchi, Jharkhand, India
| | - Varinder Singh
- Lady Hardinge Medical College and Associated Kalawati Saran Children's Hospital, New Delhi, India
| | | | - Deepak Sundriyal
- All India Institute of Medical Sciences, Rishikesh, Uttarakhand, India
| | | | - T. Avinash
- Kidwai Memorial Institute of Oncology, Bengaluru, Karnataka, India
| | | | - Sopai Tawsik
- Tomo Riba Institute of Health and Medical Sciences, Naharlagun, Arunachal Pradesh, India
| | - Lokesh Tiwari
- All India Institute of Medical Sciences, Patna, Bihar, India
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Abstract
With the fast development in services related to localisation, location-based service (LBS) gains more importance amongst all the mobile wireless services. To avail the service in the LBS system, information about the location and identity of the user has to be provided to the service provider. The service provider authenticates the user based on their identity and location before providing services. In general, sharing location information and preserving the user’s privacy is a highly challenging task in conventional authentication techniques. To resolve these challenges in authenticating the users, retaining users’ privacy, a new SVD (singular value decomposition) based Privacy Preserved Location Authentication Scheme (SPPLAS) has been proposed. In this proposed method, physical layer signatures such as channel state information (CSI) and carrier frequency offset (CFO) are used for generating secret key required for encrypting the user’s location and identity information, and thus encrypted user’s information is sent to service provider for authentication. Secret key is generated by applying SVD on CSI vector. The proposed scheme aids in authenticating the user through location information while protecting the user’s privacy. The performance of the proposed method is evaluated in terms of bit mismatch, leakage and bit error rate performance of receiver and adversary. The simulation results show that the proposed scheme achieves better robustness and security than the existing location-based authentication techniques.
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Gunaseelan K, Jadhav DA, Gajalakshmi S, Pant D. Blending of microbial inocula: An effective strategy for performance enhancement of clayware Biophotovoltaics microbial fuel cells. Bioresour Technol 2021; 323:124564. [PMID: 33360719 DOI: 10.1016/j.biortech.2020.124564] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 12/13/2020] [Accepted: 12/14/2020] [Indexed: 06/12/2023]
Abstract
Performance of clayware Biophotovoltaics (BPVs) with three variants of inocula namely anoxygenic photosynthetic bacteria (APB) rich Effective microbes (EM), Up-flow anaerobic sludge blanket reactor (UASB) sludge, SUPER-MIX the blend of EM and UASB inoculum were evaluated on the basis of electrical output and pollutant removal. SUPER-MIX inocula with microbial community comprising of 28.42% APB and 71.58% of other microbes resulted in peak power density of 275 mW/m2, 69.3 ± 1.74% Coulombic efficiency and 91 ± 3.96% organic matter removal. The higher performance of the SUPER-MIX than EM and UASB inocula was due to the syntrophic associations of the various APBs and other heterogenous microorganisms in perfect blend which improved biocatalytic electron transfer, electro-kinetic activities with higher redox current and bio-capacitance. The promising performance of clayware BPVs with SUPER-MIX inocula indicate the possibility of BPVs to move towards the scale-up process to minimize the investment towards pure culture by effective blending strategies of inocula.
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Affiliation(s)
- K Gunaseelan
- Sustainable Fuel Cells Technology Lab, Centre for Pollution Control & Environmental Engineering, Pondicherry University, Puducherry 605 014, India
| | - Dipak A Jadhav
- Department of Agricultural Engineering, Maharashtra Institute of Technology, Aurangabad 431010, India
| | - S Gajalakshmi
- Sustainable Fuel Cells Technology Lab, Centre for Pollution Control & Environmental Engineering, Pondicherry University, Puducherry 605 014, India.
| | - Deepak Pant
- Separation and Conversion Technology, Flemish Institute for Technological Research (VITO), Boeretang 200, 2400 Mol, Belgium
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Wang Y, Yauk YK, Zhao Q, Hamiaux C, Xiao Z, Gunaseelan K, Zhang L, Tomes S, López-Girona E, Cooney J, Li H, Chagné D, Ma F, Li P, Atkinson RG. Biosynthesis of the Dihydrochalcone Sweetener Trilobatin Requires Phloretin Glycosyltransferase2. Plant Physiol 2020; 184:738-752. [PMID: 32732350 PMCID: PMC7536660 DOI: 10.1104/pp.20.00807] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Accepted: 07/16/2020] [Indexed: 06/11/2023]
Abstract
Epidemics of obesity and type 2 diabetes drive strong consumer interest in plant-based low-calorie sweeteners. Trilobatin is a sweetener found at high concentrations in the leaves of a range of crabapple (Malus) species, but not in domesticated apple (Malus × domestica) leaves, which contain trilobatin's bitter positional isomer phloridzin. Variation in trilobatin content was mapped to the Trilobatin locus on LG 7 in a segregating population developed from a cross between domesticated apples and crabapples. Phloretin glycosyltransferase2 (PGT2) was identified by activity-directed protein purification and differential gene expression analysis in samples high in trilobatin but low in phloridzin. Markers developed for PGT2 cosegregated strictly with the Trilobatin locus. Biochemical analysis showed PGT2 efficiently catalyzed 4'-o-glycosylation of phloretin to trilobatin as well as 3-hydroxyphloretin to sieboldin. Transient expression of double bond reductase, chalcone synthase, and PGT2 genes reconstituted the apple pathway for trilobatin production in Nicotiana benthamiana Transgenic M. × domestica plants overexpressing PGT2 produced high concentrations of trilobatin in young leaves. Transgenic plants were phenotypically normal, and no differences in disease susceptibility were observed compared to wild-type plants grown under simulated field conditions. Sensory analysis indicated that apple leaf teas from PGT2 transgenics were readily discriminated from control leaf teas and were perceived as significantly sweeter. Identification of PGT2 allows marker-aided selection to be developed to breed apples containing trilobatin, and for high amounts of this natural low-calorie sweetener to be produced via biopharming and metabolic engineering in yeast.
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Affiliation(s)
- Yule Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yar-Khing Yauk
- The New Zealand Institute for Plant and Food Research Ltd, Auckland 1142, New Zealand
| | - Qian Zhao
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Cyril Hamiaux
- The New Zealand Institute for Plant and Food Research Ltd, Auckland 1142, New Zealand
| | - Zhengcao Xiao
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | | | - Lei Zhang
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Sumathi Tomes
- The New Zealand Institute for Plant and Food Research Ltd, Auckland 1142, New Zealand
| | - Elena López-Girona
- The New Zealand Institute for Plant and Food Research Ltd, Palmerston North 4442, New Zealand
| | - Janine Cooney
- The New Zealand Institute for Plant and Food Research Ltd, Hamilton 3240, New Zealand
| | - Houhua Li
- College of Landscape Architecture and Arts, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - David Chagné
- The New Zealand Institute for Plant and Food Research Ltd, Palmerston North 4442, New Zealand
| | - Fengwang Ma
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Pengmin Li
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Ross G Atkinson
- The New Zealand Institute for Plant and Food Research Ltd, Auckland 1142, New Zealand
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Dubashi B, Kayal S, Matta K, Thumaty DB, Yadav N, Kadambari D, ch Toi P, Gunaseelan K, Ganesan P. Abstract P3-07-13: Neoadjuvant composite score as a prognostic marker in early and locally advanced triple negative breast cancer. Cancer Res 2020. [DOI: 10.1158/1538-7445.sabcs19-p3-07-13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Aim Triple negative subtype (TNBC) is an aggressive breast cancer with inferior survival. Pathological CR (pCR) is a good surrogate endpoint for survival among patients receiving neoadjuvant chemotherapy (NACT). We attempted to validate the composite score(CPS) (Jaccqueline et al, J Clin Oncol 26:246-252) combining clinical and pathological variables among TNBC patients receiving NACT at our center. Methodology Data of patients with TNBC who underwent NACT between January 2014 to July 2017 was retrospectively analysed. The composite CPS score included cTN stage and y pTN stage, and ranged from 0 to 4. This was calculated using an online software (http://www3.mdanderson.org/app/medcalc/index.cfm?pagename=bcnt). The scores obtained from the calculator was used to develop a risk grouping into low risk (0,1) and High risk (2,3,4). Overall survival (OS)and disease free survival (DFS) were calculated using the Kaplan-Meier method and differences was examined using the log rank test. Results Seventy-eight patients with TNBC [median age: 45 (24-75)] had received NACT (anthracyclines and taxanes). Early and locally advanced breast cancer constituted 17 (21.8 %) and 61 (78.2%) respectively and 22 (28.2 %) achieved pCR. After a median follow up of 28 months (5-62), 3-yr DFS and OS were 59% and 82% respectively for the entire population. The 3-yr DFS in low (n=18) and high risk (n=60) patients was 85.7% and 51.4% respectively (p=0.032). The 3-yr OS in the low and high risk was 93% and 79% respectively(p=0.28, NS). Conclusion Our study supports the use of the composite clinical pathological score (CPS) as a prognostic marker in patients with non-metastatic triple negative breast cancer. The risk stratification developed may help identify patients who may require additional adjuvant therapy.
Citation Format: Biswajit Dubashi, Smita Kayal, Kirankumar Matta, Divya bala Thumaty, Nisha Yadav, D Kadambari, Pampa ch Toi, K Gunaseelan, Prasanth Ganesan. Neoadjuvant composite score as a prognostic marker in early and locally advanced triple negative breast cancer [abstract]. In: Proceedings of the 2019 San Antonio Breast Cancer Symposium; 2019 Dec 10-14; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2020;80(4 Suppl):Abstract nr P3-07-13.
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Affiliation(s)
- Biswajit Dubashi
- Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - Smita Kayal
- Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - Kirankumar Matta
- Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - Divya bala Thumaty
- Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - Nisha Yadav
- Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - D Kadambari
- Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - Pampa ch Toi
- Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - K Gunaseelan
- Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - Prasanth Ganesan
- Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
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8
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Ganesan S, Thulasingam M, Gunaseelan K, Kalaiarasi R, Penumadu P, Ravichandran S, Alexander A, Rogers SN. Validity and Reliability of Tamil translated University of Washington Quality of Life Questionnaire for Head and Neck Cancers. Asian Pac J Cancer Prev 2019; 20:3649-3654. [PMID: 31870106 PMCID: PMC7173376 DOI: 10.31557/apjcp.2019.20.12.3649] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Indexed: 12/24/2022] Open
Abstract
Background: Quality of life is an important outcome measure used both in research and patient care across all cultural healthcare settings. Objective: This study is aimed to evaluate the validity and reliability of interviewer-administered Tamil translated University of Washington Quality of Life Questionnaire (Version 4) in a setting with low literacy. Methods: The study was done in a tertiary care teaching institute in Puducherry, South India. The translation was done by using ‘forward-backward translation method.’ A hundred subjects diagnosed with head and neck cancer (HNC) were interviewed before the initiation of treatment. The Tamil version of University of Washington Quality of Life Questionnaire (UWQOL) questionnaire was validated using the Tamil version of the World Health Organization Quality of Life-Brief questionnaire (WHOQOL-BREF) version. Inter-rater reliability and test-retest reliability was also assessed. Item-total correlation and Cronbach alpha were calculated for assessing validity and internal consistency respectively. Results: In the Tamil version of UWQOL, social-emotional subscale was more affected than physical subscale. The domains such as mood, anxiety, and pain were most affected. The subscale scores were significantly different between those with early and late cancer. Tamil version of UWQOL showed moderate correlation with WHOQOL-BREF. The Tamil version of UWQOL had good test-retest and inter-rater agreement. Item-total correlation for the subscales was >0.80. The internal consistency of the Tamil Questionnaire was acceptable with Cronbach Alpha of 0.69. Conclusion: The Tamil version of UWQOL questionnaire is a short, valid and reliable for HNC patients of low literacy.
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Affiliation(s)
- Sivaraman Ganesan
- Department of ENT, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - Mahalakshmy Thulasingam
- Department of Preventive and Social Medicine, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - K Gunaseelan
- Department of Radiation Oncology, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - R Kalaiarasi
- Department of ENT, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - Prasanth Penumadu
- Department of Surgical Oncology, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - Surya Ravichandran
- Department of ENT, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - Arun Alexander
- Department of ENT, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - Simon N Rogers
- Regional Maxillofacial Unit, University Hospital Aintree, Liverpool, United Kingdom
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Gunaseelan K, McAtee PA, Nardozza S, Pidakala P, Wang R, David K, Burdon J, Schaffer RJ. Copy number variants in kiwifruit ETHYLENE RESPONSE FACTOR/APETALA2 (ERF/AP2)-like genes show divergence in fruit ripening associated cold and ethylene responses in C-REPEAT/DRE BINDING FACTOR-like genes. PLoS One 2019; 14:e0216120. [PMID: 31083658 PMCID: PMC6513069 DOI: 10.1371/journal.pone.0216120] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Accepted: 04/14/2019] [Indexed: 12/31/2022] Open
Abstract
The ETYHLENE RESPONSE FACTOR/APETALA2 (ERF/AP2) transcription factors have been shown to control a wide range of developmental and environmental responses in plants. These include hormonal responses to ethylene and Abscisic Acid (ABA) as well as to cold and drought. In Actinidia chinensis (kiwifruit), ripening is unusual: although it is sometimes classed as a climacteric fruit (ethylene-associated ripening), much of fruit ripening occurs independently from autocatalytic ethylene production. Initiation of ripening appears to be strongly developmentally controlled and modulated by low temperature. In this study, fruit treated with different temperatures showed an increase in soluble sugar accumulation, and a corresponding increase in ß-AMYLASE (BAM) genes (predominantly BAM3.2 and BAM9) with lower temperatures. To investigate the potential role of the AP2/ERF gene family in the control of fruit ripening in kiwifruit this family was investigated further. Using the new genome annotation and further genome sequence analysis we identified 226 ERF-like genes, 10 AP2L/RAV-like genes and 32 AP2-like genes. An RNA-seq screen from kiwifruit of different maturities, and following treatment with ethylene and temperatures between 0 and 16°C, revealed 4%, 26% and 18% of the ERF-like genes were upregulated by maturation, ethylene and cold temperatures, respectively. Focusing on the C-REPEAT/DRE BINDING FACTOR (CBF) cold master regulators, nine potential genes were identified based on sequence similarity. Five of these CBF-like genes were found in a copy number variant (CNV) cluster of six genes on chromosome 14. Expression analysis showed that two homeologous genes (ERF41 and ERF180) increased in abundance with cold and ethylene, while the cluster of CNV CBF-like genes had lost the ability to respond to cold and increased only with ethylene, suggesting an evolutionary progression of function of these genes.
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Affiliation(s)
| | - Peter A. McAtee
- The New Zealand Institute for Plant and Food Research Ltd, Auckland, New Zealand
| | - Simona Nardozza
- The New Zealand Institute for Plant and Food Research Ltd, Auckland, New Zealand
| | - Paul Pidakala
- The New Zealand Institute for Plant and Food Research Ltd, Auckland, New Zealand
| | - Ruiling Wang
- The New Zealand Institute for Plant and Food Research Ltd, Auckland, New Zealand
- School of Biological Sciences, University of Auckland, Auckland, New Zealand
| | - Karine David
- School of Biological Sciences, University of Auckland, Auckland, New Zealand
| | - Jeremy Burdon
- The New Zealand Institute for Plant and Food Research Ltd, Auckland, New Zealand
| | - Robert J. Schaffer
- School of Biological Sciences, University of Auckland, Auckland, New Zealand
- The New Zealand Institute for Plant and Food Research Ltd, Motueka, New Zealand
- * E-mail:
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10
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Pilkington SM, Crowhurst R, Hilario E, Nardozza S, Fraser L, Peng Y, Gunaseelan K, Simpson R, Tahir J, Deroles SC, Templeton K, Luo Z, Davy M, Cheng C, McNeilage M, Scaglione D, Liu Y, Zhang Q, Datson P, De Silva N, Gardiner SE, Bassett H, Chagné D, McCallum J, Dzierzon H, Deng C, Wang YY, Barron L, Manako K, Bowen J, Foster TM, Erridge ZA, Tiffin H, Waite CN, Davies KM, Grierson EP, Laing WA, Kirk R, Chen X, Wood M, Montefiori M, Brummell DA, Schwinn KE, Catanach A, Fullerton C, Li D, Meiyalaghan S, Nieuwenhuizen N, Read N, Prakash R, Hunter D, Zhang H, McKenzie M, Knäbel M, Harris A, Allan AC, Gleave A, Chen A, Janssen BJ, Plunkett B, Ampomah-Dwamena C, Voogd C, Leif D, Lafferty D, Souleyre EJF, Varkonyi-Gasic E, Gambi F, Hanley J, Yao JL, Cheung J, David KM, Warren B, Marsh K, Snowden KC, Lin-Wang K, Brian L, Martinez-Sanchez M, Wang M, Ileperuma N, Macnee N, Campin R, McAtee P, Drummond RSM, Espley RV, Ireland HS, Wu R, Atkinson RG, Karunairetnam S, Bulley S, Chunkath S, Hanley Z, Storey R, Thrimawithana AH, Thomson S, David C, Testolin R, Huang H, Hellens RP, Schaffer RJ. A manually annotated Actinidia chinensis var. chinensis (kiwifruit) genome highlights the challenges associated with draft genomes and gene prediction in plants. BMC Genomics 2018; 19:257. [PMID: 29661190 PMCID: PMC5902842 DOI: 10.1186/s12864-018-4656-3] [Citation(s) in RCA: 107] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2017] [Accepted: 04/10/2018] [Indexed: 11/29/2022] Open
Abstract
Background Most published genome sequences are drafts, and most are dominated by computational gene prediction. Draft genomes typically incorporate considerable sequence data that are not assigned to chromosomes, and predicted genes without quality confidence measures. The current Actinidia chinensis (kiwifruit) ‘Hongyang’ draft genome has 164 Mb of sequences unassigned to pseudo-chromosomes, and omissions have been identified in the gene models. Results A second genome of an A. chinensis (genotype Red5) was fully sequenced. This new sequence resulted in a 554.0 Mb assembly with all but 6 Mb assigned to pseudo-chromosomes. Pseudo-chromosomal comparisons showed a considerable number of translocation events have occurred following a whole genome duplication (WGD) event some consistent with centromeric Robertsonian-like translocations. RNA sequencing data from 12 tissues and ab initio analysis informed a genome-wide manual annotation, using the WebApollo tool. In total, 33,044 gene loci represented by 33,123 isoforms were identified, named and tagged for quality of evidential support. Of these 3114 (9.4%) were identical to a protein within ‘Hongyang’ The Kiwifruit Information Resource (KIR v2). Some proportion of the differences will be varietal polymorphisms. However, as most computationally predicted Red5 models required manual re-annotation this proportion is expected to be small. The quality of the new gene models was tested by fully sequencing 550 cloned ‘Hort16A’ cDNAs and comparing with the predicted protein models for Red5 and both the original ‘Hongyang’ assembly and the revised annotation from KIR v2. Only 48.9% and 63.5% of the cDNAs had a match with 90% identity or better to the original and revised ‘Hongyang’ annotation, respectively, compared with 90.9% to the Red5 models. Conclusions Our study highlights the need to take a cautious approach to draft genomes and computationally predicted genes. Our use of the manual annotation tool WebApollo facilitated manual checking and correction of gene models enabling improvement of computational prediction. This utility was especially relevant for certain types of gene families such as the EXPANSIN like genes. Finally, this high quality gene set will supply the kiwifruit and general plant community with a new tool for genomics and other comparative analysis. Electronic supplementary material The online version of this article (10.1186/s12864-018-4656-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Sarah M Pilkington
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Ross Crowhurst
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Elena Hilario
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Simona Nardozza
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Lena Fraser
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Yongyan Peng
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand.,School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
| | - Kularajathevan Gunaseelan
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Robert Simpson
- PFR, Private Bag 11600, Palmerston North, 4442, New Zealand
| | - Jibran Tahir
- PFR, Private Bag 11600, Palmerston North, 4442, New Zealand
| | | | - Kerry Templeton
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Zhiwei Luo
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Marcus Davy
- PFR, 412 No 1 Road, Te Puke, Bay of Plenty, 3182, New Zealand
| | - Canhong Cheng
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Mark McNeilage
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Davide Scaglione
- IGA Technology Services, Parco Scientifico e Tecnologico, Udine, Italy
| | - Yifei Liu
- South China Botanic Gardens, Chinese Academy of Sciences, Guangzhou, 510650, Guangdong, China
| | - Qiong Zhang
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Botanical Garden, Chinese Academy of Sciences, Wuhan, 430074, Wuhan, China
| | - Paul Datson
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Nihal De Silva
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | | | | | - David Chagné
- PFR, Private Bag 11600, Palmerston North, 4442, New Zealand
| | - John McCallum
- PFR, Private Bag 4704, Christchurch, 8140, New Zealand
| | - Helge Dzierzon
- PFR, Private Bag 11600, Palmerston North, 4442, New Zealand
| | - Cecilia Deng
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Yen-Yi Wang
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Lorna Barron
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Kelvina Manako
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Judith Bowen
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Toshi M Foster
- PFR, Private Bag 11600, Palmerston North, 4442, New Zealand
| | - Zoe A Erridge
- PFR, Private Bag 11600, Palmerston North, 4442, New Zealand
| | - Heather Tiffin
- PFR, Private Bag 11600, Palmerston North, 4442, New Zealand
| | - Chethi N Waite
- PFR, Private Bag 11600, Palmerston North, 4442, New Zealand
| | - Kevin M Davies
- PFR, Private Bag 11600, Palmerston North, 4442, New Zealand
| | | | | | - Rebecca Kirk
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Xiuyin Chen
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Marion Wood
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Mirco Montefiori
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | | | | | | | - Christina Fullerton
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Dawei Li
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Botanical Garden, Chinese Academy of Sciences, Wuhan, 430074, Wuhan, China
| | | | - Niels Nieuwenhuizen
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Nicola Read
- School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
| | - Roneel Prakash
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Don Hunter
- PFR, Private Bag 11600, Palmerston North, 4442, New Zealand
| | - Huaibi Zhang
- PFR, Private Bag 11600, Palmerston North, 4442, New Zealand
| | | | - Mareike Knäbel
- PFR, Private Bag 11600, Palmerston North, 4442, New Zealand
| | - Alastair Harris
- School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
| | - Andrew C Allan
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand.,School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
| | - Andrew Gleave
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Angela Chen
- School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
| | - Bart J Janssen
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Blue Plunkett
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Charles Ampomah-Dwamena
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Charlotte Voogd
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Davin Leif
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand.,School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
| | - Declan Lafferty
- School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
| | - Edwige J F Souleyre
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Erika Varkonyi-Gasic
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Francesco Gambi
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Jenny Hanley
- School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
| | - Jia-Long Yao
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Joey Cheung
- School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
| | - Karine M David
- School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
| | - Ben Warren
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Ken Marsh
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Kimberley C Snowden
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Kui Lin-Wang
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Lara Brian
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Marcela Martinez-Sanchez
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Mindy Wang
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Nadeesha Ileperuma
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Nikolai Macnee
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Robert Campin
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Peter McAtee
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Revel S M Drummond
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Richard V Espley
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Hilary S Ireland
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Rongmei Wu
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Ross G Atkinson
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Sakuntala Karunairetnam
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Sean Bulley
- PFR, 412 No 1 Road, Te Puke, Bay of Plenty, 3182, New Zealand
| | - Shayhan Chunkath
- School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
| | - Zac Hanley
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Roy Storey
- PFR, 412 No 1 Road, Te Puke, Bay of Plenty, 3182, New Zealand
| | - Amali H Thrimawithana
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Susan Thomson
- PFR, Private Bag 4704, Christchurch, 8140, New Zealand
| | - Charles David
- PFR, Private Bag 4704, Christchurch, 8140, New Zealand
| | - Raffaele Testolin
- IGA Technology Services, Parco Scientifico e Tecnologico, Udine, Italy.,Department of Agricultural and Environmental Sciences, University of Udine, Via delle Scienze 208, 33100, Udine, Italy
| | - Hongwen Huang
- South China Botanic Gardens, Chinese Academy of Sciences, Guangzhou, 510650, Guangdong, China.,Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Botanical Garden, Chinese Academy of Sciences, Wuhan, 430074, Wuhan, China
| | - Roger P Hellens
- Institute for Future Environments, Queensland University of Technology (QUT), Brisbane, 4001, Australia
| | - Robert J Schaffer
- The New Zealand Institute for Plant & Food Research Ltd (PFR), Private Bag 92169, Auckland, 1142, New Zealand. .,School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand.
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11
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Nidhi MT, Gunaseelan K. Efficient Ranking of Diabetic Retinopathy and Glaucoma Using Echo State Neural Network and Radial Basis Function (RBF). J Med Imaging Hlth Inform 2016. [DOI: 10.1166/jmihi.2016.1762] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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McAtee PA, Richardson AC, Nieuwenhuizen NJ, Gunaseelan K, Hoong L, Chen X, Atkinson RG, Burdon JN, David KM, Schaffer RJ. The hybrid non-ethylene and ethylene ripening response in kiwifruit (Actinidia chinensis) is associated with differential regulation of MADS-box transcription factors. BMC Plant Biol 2015; 15:304. [PMID: 26714876 PMCID: PMC4696264 DOI: 10.1186/s12870-015-0697-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Accepted: 12/21/2015] [Indexed: 05/04/2023]
Abstract
BACKGROUND Ripening in tomato is predominantly controlled by ethylene, whilst in fruit such as grape, it is predominantly controlled by other hormones. The ripening response of many kiwifruit (Actinidia) species is atypical. The majority of ripening-associated fruit starch hydrolysis, colour change and softening occurs in the apparent absence of ethylene production (Phase 1 ripening) whilst Phase 2 ripening requires autocatalytic ethylene production and is associated with further softening and an increase in aroma volatiles. RESULTS To dissect the ripening response in the yellow-fleshed kiwifruit A. chinensis ('Hort16A'), a two dimensional developmental stage X ethylene response time study was undertaken. As fruit progressed through maturation and Phase 1 ripening, fruit were treated with different concentrations of propylene and ethylene. At the start of Phase 1 ripening, treated fruit responded to ethylene, and were capable of producing endogenous ethylene. As the fruit progressed through Phase 1 ripening, the fruit became less responsive to ethylene and endogeneous ethylene production was partially repressed. Towards the end of Phase 1 ripening the fruit were again able to produce high levels of ethylene. Progression through Phase 1 ripening coincided with a developmental increase in the expression of the ethylene-unresponsive MADS-box FRUITFUL-like gene (FUL1). The ability to respond to ethylene however coincided with a change in expression of another MADS-box gene SEPALLATA4/RIPENING INHIBITOR-like (SEP4/RIN). The promoter of SEP4/RIN was shown to be transactivated by EIN3-like transcription factors, but unlike tomato, not by SEP4/RIN itself. Transient over-expression of SEP4/RIN in kiwifruit caused an increase in ethylene production. CONCLUSIONS These results suggest that the non-ethylene/ethylene ripening response observed in kiwifruit is a hybrid of both the tomato and grape ripening progression, with Phase 1 being akin to the RIN/ethylene inhibitory response observed in grape and Phase 2 akin to the RIN-associated autocatalytic ethylene response observed in tomato.
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Affiliation(s)
- Peter A McAtee
- The New Zealand Institute for Plant & Food Research Limited (PFR), Mt Albert Research Centre, Auckland, New Zealand.
- School of Biological Sciences, University of Auckland, Auckland, New Zealand.
| | | | - Niels J Nieuwenhuizen
- The New Zealand Institute for Plant & Food Research Limited (PFR), Mt Albert Research Centre, Auckland, New Zealand.
- School of Biological Sciences, University of Auckland, Auckland, New Zealand.
| | - Kularajathevan Gunaseelan
- The New Zealand Institute for Plant & Food Research Limited (PFR), Mt Albert Research Centre, Auckland, New Zealand.
| | - Ling Hoong
- The New Zealand Institute for Plant & Food Research Limited (PFR), Mt Albert Research Centre, Auckland, New Zealand.
- School of Biological Sciences, University of Auckland, Auckland, New Zealand.
| | - Xiuyin Chen
- The New Zealand Institute for Plant & Food Research Limited (PFR), Mt Albert Research Centre, Auckland, New Zealand.
| | - Ross G Atkinson
- The New Zealand Institute for Plant & Food Research Limited (PFR), Mt Albert Research Centre, Auckland, New Zealand.
| | - Jeremy N Burdon
- The New Zealand Institute for Plant & Food Research Limited (PFR), Mt Albert Research Centre, Auckland, New Zealand.
| | - Karine M David
- School of Biological Sciences, University of Auckland, Auckland, New Zealand.
| | - Robert J Schaffer
- The New Zealand Institute for Plant & Food Research Limited (PFR), Mt Albert Research Centre, Auckland, New Zealand.
- School of Biological Sciences, University of Auckland, Auckland, New Zealand.
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13
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Ireland HS, Gunaseelan K, Muddumage R, Tacken EJ, Putterill J, Johnston JW, Schaffer RJ. Ethylene regulates Apple (Malus x domestica) fruit softening through a dose x time-dependent mechanism and through differential sensitivities and dependencies of cell wall-modifying genes. Plant Cell Physiol 2014; 55:1005-16. [PMID: 24553848 DOI: 10.1093/pcp/pcu034] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
In fleshy fruit species that have a strong requirement for ethylene to ripen, ethylene is synthesized autocatalytically, producing increasing concentrations as the fruits ripen. Apple fruit with the ACC OXIDASE 1 (ACO1) gene suppressed cannot produce ethylene autocatalytically at ripening. Using these apple lines, an ethylene sensitivity dependency model was previously proposed, with traits such as softening showing a high dependency for ethylene as well as low sensitivity. In this study, it is shown that the molecular control of fruit softening is a complex process, with different cell wall-related genes being independently regulated and exhibiting differential sensitivities to and dependencies on ethylene at the transcriptional level. This regulation is controlled through a dose × time mechanism, which results in a temporal transcriptional response that would allow for progressive cell wall disassembly and thus softening. This research builds on the sensitivity dependency model and shows that ethylene-dependent traits can progress over time to the same degree with lower levels of ethylene. This suggests that a developmental clock measuring cumulative ethylene controls the fruit ripening process.
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Affiliation(s)
- Hilary S Ireland
- The New Zealand Institute for Plant & Food Research Ltd, Private Bag 92169, Auckland 1142, New Zealand
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14
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Ireland HS, Yao JL, Tomes S, Sutherland PW, Nieuwenhuizen N, Gunaseelan K, Winz RA, David KM, Schaffer RJ. Apple SEPALLATA1/2-like genes control fruit flesh development and ripening. Plant J 2013; 73:1044-56. [PMID: 23236986 DOI: 10.1111/tpj.12094] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2012] [Revised: 11/29/2012] [Accepted: 12/10/2012] [Indexed: 05/19/2023]
Abstract
Flowering plants utilize different floral structures to develop flesh tissue in fruits. Here we show that suppression of the homeologous SEPALLATA1/2-like genes MADS8 and MADS9 in the fleshy fruit apple (Malus x domestica) leads to sepaloid petals and greatly reduced fruit flesh. Immunolabelling of cell-wall epitopes and differential staining showed that the developing hypanthium (from which the apple flesh develops) of MADS8/9-suppressed apple flowers lacks a tissue layer, and the remaining flesh tissue of fully developed apples has considerably smaller cells. From these observations, it is proposed that MADS8 and MADS9 control the development of discrete zones within the hypanthium tissue, and therefore fruit flesh, and also act as foundations for development of different floral organs. At fruit maturity, the MADS8/9-suppressed apples do not ripen in terms of both developmentally controlled ripening characters, such as starch degradation, and ethylene-modulated ripening traits. Transient assays suggest that, like the RIN gene in tomato, the MADS9 gene acts as a transcriptional activator of the ethylene biosynthesis enzyme, 1-aminocyclopropane-1-carboxylate (ACC) synthase 1. The existence of a single class of genes that regulate both flesh formation and ripening provides an evolutionary tool for controlling two critical aspects of fleshy fruit development.
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Affiliation(s)
- Hilary S Ireland
- New Zealand Institute of Plant & Food Research Ltd, Private Bag 92169, Auckland, 1142, New Zealand
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15
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Atkinson RG, Sutherland PW, Johnston SL, Gunaseelan K, Hallett IC, Mitra D, Brummell DA, Schröder R, Johnston JW, Schaffer RJ. Down-regulation of POLYGALACTURONASE1 alters firmness, tensile strength and water loss in apple (Malus x domestica) fruit. BMC Plant Biol 2012; 12:129. [PMID: 22856470 PMCID: PMC3509026 DOI: 10.1186/1471-2229-12-129] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2012] [Accepted: 07/25/2012] [Indexed: 05/18/2023]
Abstract
BACKGROUND While there is now a significant body of research correlating apple (Malus x domestica) fruit softening with the cell wall hydrolase ENDO-POLYGALACTURONASE1 (PG1), there is currently little knowledge of its physiological effects in planta. This study examined the effect of down regulation of PG1 expression in 'Royal Gala' apples, a cultivar that typically has high levels of PG1, and softens during fruit ripening. RESULTS PG1-suppressed 'Royal Gala' apples harvested from multiple seasons were firmer than controls after ripening, and intercellular adhesion was higher. Cell wall analyses indicated changes in yield and composition of pectin, and a higher molecular weight distribution of CDTA-soluble pectin. Structural analyses revealed more ruptured cells and free juice in pulled apart sections, suggesting improved integrity of intercellular connections and consequent cell rupture due to failure of the primary cell walls under stress. PG1-suppressed lines also had reduced expansion of cells in the hypodermis of ripe apples, resulting in more densely packed cells in this layer. This change in morphology appears to be linked with reduced transpirational water loss in the fruit. CONCLUSIONS These findings confirm PG1's role in apple fruit softening and suggests that this is achieved in part by reducing cellular adhesion. This is consistent with previous studies carried out in strawberry but not with those performed in tomato. In apple PG1 also appears to influence other fruit texture characters such as juiciness and water loss.
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Affiliation(s)
- Ross G Atkinson
- The New Zealand Institute for Plant & Food Research Limited (PFR), Mount Albert Research Centre, Private Bag 92169, Auckland 1142, New Zealand
| | - Paul W Sutherland
- The New Zealand Institute for Plant & Food Research Limited (PFR), Mount Albert Research Centre, Private Bag 92169, Auckland 1142, New Zealand
| | - Sarah L Johnston
- The New Zealand Institute for Plant & Food Research Limited (PFR), Mount Albert Research Centre, Private Bag 92169, Auckland 1142, New Zealand
| | - Kularajathevan Gunaseelan
- The New Zealand Institute for Plant & Food Research Limited (PFR), Mount Albert Research Centre, Private Bag 92169, Auckland 1142, New Zealand
| | - Ian C Hallett
- The New Zealand Institute for Plant & Food Research Limited (PFR), Mount Albert Research Centre, Private Bag 92169, Auckland 1142, New Zealand
| | - Deepali Mitra
- The New Zealand Institute for Plant & Food Research Limited (PFR), Mount Albert Research Centre, Private Bag 92169, Auckland 1142, New Zealand
| | - David A Brummell
- PFR, Food Industry Science Centre, Private Bag 11600, Palmerston North, 4442, New Zealand
| | - Roswitha Schröder
- The New Zealand Institute for Plant & Food Research Limited (PFR), Mount Albert Research Centre, Private Bag 92169, Auckland 1142, New Zealand
| | - Jason W Johnston
- The New Zealand Institute for Plant & Food Research Limited (PFR), Mount Albert Research Centre, Private Bag 92169, Auckland 1142, New Zealand
| | - Robert J Schaffer
- The New Zealand Institute for Plant & Food Research Limited (PFR), Mount Albert Research Centre, Private Bag 92169, Auckland 1142, New Zealand
- The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
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16
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Devoghalaere F, Doucen T, Guitton B, Keeling J, Payne W, Ling TJ, Ross JJ, Hallett IC, Gunaseelan K, Dayatilake GA, Diak R, Breen KC, Tustin DS, Costes E, Chagné D, Schaffer RJ, David KM. A genomics approach to understanding the role of auxin in apple (Malus x domestica) fruit size control. BMC Plant Biol 2012; 12:7. [PMID: 22243694 PMCID: PMC3398290 DOI: 10.1186/1471-2229-12-7] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2011] [Accepted: 01/13/2012] [Indexed: 05/18/2023]
Abstract
BACKGROUND Auxin is an important phytohormone for fleshy fruit development, having been shown to be involved in the initial signal for fertilisation, fruit size through the control of cell division and cell expansion, and ripening related events. There is considerable knowledge of auxin-related genes, mostly from work in model species. With the apple genome now available, it is possible to carry out genomics studies on auxin-related genes to identify genes that may play roles in specific stages of apple fruit development. RESULTS High amounts of auxin in the seed compared with the fruit cortex were observed in 'Royal Gala' apples, with amounts increasing through fruit development. Injection of exogenous auxin into developing apples at the start of cell expansion caused an increase in cell size. An expression analysis screen of auxin-related genes involved in auxin reception, homeostasis, and transcriptional regulation showed complex patterns of expression in each class of gene. Two mapping populations were phenotyped for fruit size over multiple seasons, and multiple quantitative trait loci (QTLs) were observed. One QTL mapped to a region containing an Auxin Response Factor (ARF106). This gene is expressed during cell division and cell expansion stages, consistent with a potential role in the control of fruit size. CONCLUSIONS The application of exogenous auxin to apples increased cell expansion, suggesting that endogenous auxin concentrations are at least one of the limiting factors controlling fruit size. The expression analysis of ARF106 linked to a strong QTL for fruit weight suggests that the auxin signal regulating fruit size could partially be modulated through the function of this gene. One class of gene (GH3) removes free auxin by conjugation to amino acids. The lower expression of these GH3 genes during rapid fruit expansion is consistent with the apple maximising auxin concentrations at this point.
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Affiliation(s)
- Fanny Devoghalaere
- The New Zealand Institute for Plant & Food Research Limited (PFR), Private Bag 92169, Auckland 1142, New Zealand
| | - Thomas Doucen
- School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Baptiste Guitton
- PFR, Private Bag 11600, Palmerston North 4442, New Zealand
- INRA, UMR AGAP, Equipe Architecture et Fonctionnement des Espèces Fruitières, Avenue Agropolis - TA-A-108/03, 34398 Montpellier Cedex 01, France
| | - Jeannette Keeling
- School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Wendy Payne
- School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Toby John Ling
- School of Plant Science, University of Tasmania, GPO Box 252-55, Hobart, Tasmania 7001, Australia
| | - John James Ross
- School of Plant Science, University of Tasmania, GPO Box 252-55, Hobart, Tasmania 7001, Australia
| | - Ian Charles Hallett
- The New Zealand Institute for Plant & Food Research Limited (PFR), Private Bag 92169, Auckland 1142, New Zealand
| | - Kularajathevan Gunaseelan
- The New Zealand Institute for Plant & Food Research Limited (PFR), Private Bag 92169, Auckland 1142, New Zealand
| | - GA Dayatilake
- PFR, Private Bag 1401, Havelock North 4157, New Zealand
| | - Robert Diak
- PFR, Old Mill Road, RD3, Motueka 7198, New Zealand
| | - Ken C Breen
- PFR, Private Bag 1401, Havelock North 4157, New Zealand
| | | | - Evelyne Costes
- INRA, UMR AGAP, Equipe Architecture et Fonctionnement des Espèces Fruitières, Avenue Agropolis - TA-A-108/03, 34398 Montpellier Cedex 01, France
| | - David Chagné
- PFR, Private Bag 11600, Palmerston North 4442, New Zealand
| | - Robert James Schaffer
- The New Zealand Institute for Plant & Food Research Limited (PFR), Private Bag 92169, Auckland 1142, New Zealand
- School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Karine Myriam David
- School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
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17
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Richardson AC, Boldingh HL, McAtee PA, Gunaseelan K, Luo Z, Atkinson RG, David KM, Burdon JN, Schaffer RJ. Fruit development of the diploid kiwifruit, Actinidia chinensis 'Hort16A'. BMC Plant Biol 2011; 11:182. [PMID: 22204446 PMCID: PMC3261216 DOI: 10.1186/1471-2229-11-182] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2011] [Accepted: 12/28/2011] [Indexed: 05/05/2023]
Abstract
BACKGROUND With the advent of high throughput genomic tools, it is now possible to undertake detailed molecular studies of individual species outside traditional model organisms. Combined with a good understanding of physiological processes, these tools allow researchers to explore natural diversity, giving a better understanding of biological mechanisms. Here a detailed study of fruit development from anthesis through to fruit senescence is presented for a non-model organism, kiwifruit, Actinidia chinensis ('Hort16A'). RESULTS Consistent with previous studies, it was found that many aspects of fruit morphology, growth and development are similar to those of the model fruit tomato, except for a striking difference in fruit ripening progression. The early stages of fruit ripening occur as the fruit is still growing, and many ripening events are not associated with autocatalytic ethylene production (historically associated with respiratory climacteric). Autocatalytic ethylene is produced late in the ripening process as the fruit begins to senesce. CONCLUSION By aligning A. chinensis fruit development to a phenological scale, this study provides a reference framework for subsequent physiological and genomic studies, and will allow cross comparison across fruit species, leading to a greater understanding of the diversity of fruits found across the plant kingdom.
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Affiliation(s)
- Annette C Richardson
- The New Zealand Institute for Plant & Food Research Limited (PFR), PO Box 23, Kerikeri, 0245, New Zealand
| | | | - Peter A McAtee
- PFR Mount Albert Private Bag 92169, Auckland, 1142, New Zealand
- The University of Auckland, School of Biological Sciences, Private Bag 92019 Auckland, 1142, New Zealand
| | | | - Zhiwei Luo
- PFR Mount Albert Private Bag 92169, Auckland, 1142, New Zealand
| | - Ross G Atkinson
- PFR Mount Albert Private Bag 92169, Auckland, 1142, New Zealand
| | - Karine M David
- The University of Auckland, School of Biological Sciences, Private Bag 92019 Auckland, 1142, New Zealand
| | - Jeremy N Burdon
- PFR Mount Albert Private Bag 92169, Auckland, 1142, New Zealand
| | - Robert J Schaffer
- PFR Mount Albert Private Bag 92169, Auckland, 1142, New Zealand
- The University of Auckland, School of Biological Sciences, Private Bag 92019 Auckland, 1142, New Zealand
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18
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Surendiran A, Balamurugan N, Gunaseelan K, Akhtar S, Reddy KS, Adithan C. Adverse drug reaction profile of cisplatin-based chemotherapy regimen in a tertiary care hospital in India: An evaluative study. Indian J Pharmacol 2011; 42:40-3. [PMID: 20606836 PMCID: PMC2885639 DOI: 10.4103/0253-7613.62412] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2009] [Revised: 10/12/2009] [Accepted: 03/12/2010] [Indexed: 11/22/2022] Open
Abstract
Aims: This prospective study was designed to monitor and analyze the pattern of occurrence of adverse drug reactions (ADRs) to cisplatin-based chemotherapy regimen in the cancer ward of a tertiary care hospital. Materials and Methods: Cancer patients who received cisplatin-based cancer chemotherapy were monitored for adverse reactions. The collected reports were analyzed for demographic and drug details, causality, preventability and severity of adverse effects. Causality was assessed by the World Health Organization (WHO) causality assessment scale and Naranjo's Algorithm. Preventability and severity of ADRs were assessed by modified Schumock and Thornton scale, modified Hartwig and Siegel scale respectively. Results: Among 51 patients, 48 developed ADRs to cisplatin chemotherapy. The reactions observed were nausea, alopecia, anorexia, vomiting, taste alteration, diarrhea, constipation, tinnitus, and hypocalcaemia. The WHO causality assessment scale indicated 69% “possible” and 31% “probable” but no “certain” reactions. Naranjo's Algorithm showed 62% “probable” and 38% “possible” reactions. Most of the reactions belonged to the category of “not preventable”. Reactions like nausea and vomiting belonged to the category of “definitely preventable”. Modified Hartwig and Siegel scale of severity assessment showed that most of the reactions were of “mild level 1” severity except for vomiting, diarrhea and hypocalcaemia, which were of “moderate level 3” severity. Conclusion: Cisplatin-based chemotherapy has a high potential to cause adverse effects. Most of the reactions were of milder nature but not preventable. The common adverse effects such as nausea and vomiting were preventable, but reactions like hypersensitivity reactions and anaphylaxis were not predictable.
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Affiliation(s)
- A Surendiran
- Department of Pharmacology, JIPMER, Pondicherry, India
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19
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Atkinson RG, Gunaseelan K, Wang MY, Luo L, Wang T, Norling CL, Johnston SL, Maddumage R, Schröder R, Schaffer RJ. Dissecting the role of climacteric ethylene in kiwifruit (Actinidia chinensis) ripening using a 1-aminocyclopropane-1-carboxylic acid oxidase knockdown line. J Exp Bot 2011; 62:3821-35. [PMID: 21511911 DOI: 10.1093/jxb/err063] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
During climacteric fruit ripening, autocatalytic (Type II) ethylene production initiates a transcriptional cascade that controls the production of many important fruit quality traits including flavour production and softening. The last step in ethylene biosynthesis is the conversion of 1-aminocyclopropane-1-carboxylic acid (ACC) to ethylene by the enzyme ACC oxidase (ACO). Ten independent kiwifruit (Actinidia chinensis) lines were generated targeting suppression of fruit ripening-related ACO genes and the fruit from one of these lines (TK2) did not produce detectable levels of climacteric ethylene. Ripening behaviour in a population of kiwifruit at harvest is asynchronous, so a short burst of exogenous ethylene was used to synchronize ripening in TK2 and control fruit. Following such a treatment, TK2 and control fruit softened to an 'eating-ripe' firmness. Control fruit produced climacteric ethylene and softened beyond eating-ripe by 5 d. In contrast, TK2 fruit maintained an eating-ripe firmness for >25 d and total volatile production was dramatically reduced. Application of continuous exogenous ethylene to the ripening-arrested TK2 fruit re-initiated fruit softening and typical ripe fruit volatiles were detected. A 17 500 gene microarray identified 401 genes that changed after ethylene treatment, including a polygalacturonase and a pectate lyase involved in cell wall breakdown, and a quinone oxidoreductase potentially involved in volatile production. Many of the gene changes were consistent with the softening and flavour changes observed after ethylene treatment. However, a surprisingly large number of genes of unknown function were also observed, which could account for the unique flavour and textural properties of ripe kiwifruit.
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Affiliation(s)
- Ross G Atkinson
- New Zealand Institute for Plant and Food Research Ltd , Auckland, New Zealand.
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20
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Tacken E, Ireland H, Gunaseelan K, Karunairetnam S, Wang D, Schultz K, Bowen J, Atkinson RG, Johnston JW, Putterill J, Hellens RP, Schaffer RJ. The role of ethylene and cold temperature in the regulation of the apple POLYGALACTURONASE1 gene and fruit softening. Plant Physiol 2010; 153:294-305. [PMID: 20237022 PMCID: PMC2862417 DOI: 10.1104/pp.109.151092] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2009] [Accepted: 03/12/2010] [Indexed: 05/18/2023]
Abstract
Fruit softening in apple (Malus x domestica) is associated with an increase in the ripening hormone ethylene. Here, we show that in cv Royal Gala apples that have the ethylene biosynthetic gene ACC OXIDASE1 suppressed, a cold treatment preconditions the apples to soften independently of added ethylene. When a cold treatment is followed by an ethylene treatment, a more rapid softening occurs than in apples that have not had a cold treatment. Apple fruit softening has been associated with the increase in the expression of cell wall hydrolase genes. One such gene, POLYGALACTURONASE1 (PG1), increases in expression both with ethylene and following a cold treatment. Transcriptional regulation of PG1 through the ethylene pathway is likely to be through an ETHYLENE-INSENSITIVE3-like transcription factor, which increases in expression during apple fruit development and transactivates the PG1 promoter in transient assays in the presence of ethylene. A cold-related gene that resembles a COLD BINDING FACTOR (CBF) class of gene also transactivates the PG1 promoter. The transactivation by the CBF-like gene is greatly enhanced by the addition of exogenous ethylene. These observations give a possible molecular mechanism for the cold- and ethylene-regulated control of fruit softening and suggest that either these two pathways act independently and synergistically with each other or cold enhances the ethylene response such that background levels of ethylene in the ethylene-suppressed apples is sufficient to induce fruit softening in apples.
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21
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Pastoriza-Gallego MJ, Sánchez-Paz V, Losada-Barreiro S, Bravo-Díaz C, Gunaseelan K, Romsted LS. Effects of temperature and emulsifier concentration on alpha-tocopherol distribution in a stirred, fluid, emulsion. Thermodynamics of alpha-tocopherol transfer between the oil and interfacial regions. Langmuir 2009; 25:2646-2653. [PMID: 19437688 DOI: 10.1021/la803224j] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The combined linear sweep voltammetry (LSV)/pseudophase kinetic model method was used to obtain the first estimates of the free energies, enthalpy, and entropies of transfer of alpha-tocopherol (TOC) between the oil and interfacial regions of fluid, opaque, emulsions of n-octane, acidic water, and the nonionic surfactant hexaethyleneglycol mono dodecyl ether (C12E6) from the temperature dependence of TOC's partition constant. Determining structure-reactivity relationships for chemical reactions in emulsions is difficult because traditional methods for monitoring reactions are unsuitable and because the partitioning of reactive components between the oil, interfacial, and aqueous regions of opaque emulsions are difficult to measure. The dependence of the observed rate constant, k(obs), for the reaction of an arenediazonium probe, 16-ArN2+, with TOC was determined as a function of C12E6 volume fraction. The pseudophase kinetic model was used to estimate the interfacial rate constant, k1, and the partition constants of antioxidants between the oil and interfacial, Po(I), regions in the emulsion from k(obs) versus phiI profiles. The thermodynamic parameters of transfer from the oil to the interfacial region at a series of temperatures were respectively obtained from the PoI values (deltaGT0,O-->I), by the van't Hoff method (deltaHT0,O-->I), and from the Gibbs equation (deltaST0,O-->I). The free energy of transfer is spontaneous, and a large positive entropy of transfer dominates a positive enthalpy of transfer, indicating that the TOC headgroup disrupts the structure of the interfacial region in its immediate vicinity upon transfer from n-octane. The methods described here are applicable to any bimolecular reaction in emulsions in which one of the reactants is restricted to the interfacial region and the rate of its reaction with a second component can be monitored electrochemically.
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22
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Gunaseelan K, Romsted LS, Gallego MJP, González-Romero E, Bravo-Díaz C. Determining alpha-tocopherol distributions between the oil, water, and interfacial regions of macroemulsions: novel applications of electroanalytical chemistry and the pseudophase kinetic model. Adv Colloid Interface Sci 2006; 123-126:303-11. [PMID: 16859624 DOI: 10.1016/j.cis.2006.05.007] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The assumptions of the pseudophase model for chemical reactivity in homogeneous microemulsions are used to determine the distribution of alpha-tocopherol (TOC) in macroemulsions from changes in the observed rate constant (k(obs)) for reaction between 4-hexadecylarenediazonium ion (16-ArN2+) probe and TOC with increasing surfactant concentration. Two partition constants are needed to describe the distribution of TOC or other antioxidant (AO) or polar uncharged molecule between the oil and interfacial (P(O)(I)) and the water and interfacial (P(W)(I)) regions of stirred fluid emulsions. The observed rate constants are measured electrochemically. Here we report values of P(O)(I) and P(W)(I) for the distribution of TOC in octane/acidic water/C12E6 (hexaethylene glycol monododecyl ether) and octane/acidic water/C12E4 (Brij 30, tetraethylene glycol dodecyl ether) emulsions obtained by fitting two kinetic data sets with an equation based on the pseudophase model and solving two equations in two unknowns. The partition constants were used to estimate the %TOC in each region of the emulsions. In 1:1 oil:water C12E6 emulsions, at 2% volume fraction of C12E6, 73% of TOC is in the interfacial region, 26% in the octane and about 1% in the water. The distributions of TOC in C12E4 emulsions are similar. The combined electrochemical-pseudophase model approach is applicable to any AO or other compound that reacts with 16-ArN2+. The second-order rate constant, k(I), for reaction in the interfacial region of the emulsions is also estimated from the kinetic data and is about the same for both surfactants (k(I) approximately 0.1-0.2 M(-1)s(-1)) showing that the medium properties of the interfacial regions of C12E6 and C12E4 emulsions are similar. Comparison of these rate constants for a variety of AOs may provide a scale of AO efficiency that is independent of AO distribution between the oil, interfacial and aqueous regions of emulsions.
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Affiliation(s)
- K Gunaseelan
- Department of Chemistry and Chemical Biology, Wright-Rieman Laboratories, Rutgers, The State University of New Jersey, New Brunswick, New Jersey 08903, USA.
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23
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Gunaseelan K, Romsted LS, González-Romero E, Bravo-Díaz C. Determining partition constants of polar organic molecules between the oil/interfacial and water/interfacial regions in emulsions: a combined electrochemical and spectrometric method. Langmuir 2004; 20:3047-55. [PMID: 15875828 DOI: 10.1021/la0354279] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
We have developed a new approach for estimating distributions of polar additives in opaque, surfactant based, macroemulsions based on the pseudophase model for homogeneous micellar and microemulsion solutions. The distribution of a polar additive, such as an antioxidant, AO, within emulsions is expressed in terms of two partition constants, one between the oil and interfacial regions, P(O)I, and the other between the water and interfacial regions, P(W)I. To estimate values for P(O)I and P(W)I requires fitting two independent data sets with two independent mathematical relations and solving equations simultaneously for the two parameters. The experimental protocols were developed for determining the partition constants of tertbutylhydroquinone, TBHQ, in a stirred emulsion composed of octane, dilute aqueous acid, and hexaethyleneglycol monododecyl ether, C12E6. One data set was obtained by electrochemical determination of the observed rate constant, k(obs), for reaction of TBHQ with an arenediazonium ion probe as a function of C12E6 volume fraction. The second data set was obtained by determining the partition constant, P(O)W, of TBHQ between octane and water in the absence of surfactant by UV-visible spectrometry. TBHQ is almost 30 times more soluble in water than octane: P(O)W = 27.5. The values of the partition constants in the emulsion are P(O)I = 1.84 x 10(4) and P(W)I = 6.73 x 10(2). The partition constants were used to estimate the fraction of TBHQ in each region; for example, 96% of the TBHQ is located in the interfacial region at 0.02 volume fraction of C12E6. Our approach is quite general and should be applicable to any polar organic compound that reacts with the arenediazonium ion probe in emulsions composed of virtually any type of oil and surfactant. Comparisons of the rate constants for reaction of the antioxidant in the interfacial region of the emulsion, which can be obtained from the electrochemical results, may lead to a scale of antioxidant efficiency that is independent of the distribution of the antioxidant in the emulsion.
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Affiliation(s)
- K Gunaseelan
- Department of Chemistry and Chemical Biology, Wright-Rieman Laboratories, Rutgers, The State University of New Jersey, New Brunswick, New Jersey 08903, USA.
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Gunaseelan K, Ismail K. Estimation of micellization parameters of sodium dodecyl sulfate in water+1-butanol using the mixed electrolyte model for molar conductance. J Colloid Interface Sci 2003; 258:110-5. [PMID: 12600777 DOI: 10.1016/s0021-9797(02)00065-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The mixed electrolyte model of Shanks and Franses has been applied to estimate the critical micelle concentration, aggregation number, and counterion binding constant of sodium dodecyl sulfate in a water + 1-butanol medium from its measured conductivity data at 25 degrees C. The surface potential of the ionic micelle in this mixed solvent medium was computed by solving the nonlinear Poisson-Boltzmann equation. The standard free energy terms of micellization were also calculated. The present study confirms further the observation made in the previous studies that ionic micelles do not contribute to the ionic strength of a surfactant solution, an inference originally made by McBain and coworkers.
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Affiliation(s)
- K Gunaseelan
- Department of Chemistry, North Eastern Hill University, Shillong 793022, India
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