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Huguet MD, Robin S, Hudaverdian S, Tanguy S, Leterme-Prunier N, Cloteau R, Baulande S, Legoix-Né P, Legeai F, Simon JC, Jaquiéry J, Tagu D, Le Trionnaire G. Transcriptomic basis of sex loss in the pea aphid. BMC Genomics 2024; 25:202. [PMID: 38383295 PMCID: PMC10882735 DOI: 10.1186/s12864-023-09776-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Accepted: 10/31/2023] [Indexed: 02/23/2024] Open
Abstract
BACKGROUND Transitions from sexual to asexual reproduction are common in eukaryotes, but the underlying mechanisms remain poorly known. The pea aphid-Acyrthosiphon pisum-exhibits reproductive polymorphism, with cyclical parthenogenetic and obligate parthenogenetic lineages, offering an opportunity to decipher the genetic basis of sex loss. Previous work on this species identified a single 840 kb region controlling reproductive polymorphism and carrying 32 genes. With the aim of identifying the gene(s) responsible for sex loss and the resulting consequences on the genetic programs controlling sexual or asexual embryogenesis, we compared the transcriptomic response to photoperiod shortening-the main sex-inducing cue-of a sexual and an obligate asexual lineage of the pea aphid, focusing on heads (where the photoperiodic cue is detected) and embryos (the final target of the cue). RESULTS Our analyses revealed that four genes (one expressed in the head, and three in the embryos) of the region responded differently to photoperiod in the two lineages. We also found that the downstream genetic programs expressed during embryonic development of a future sexual female encompass ∼1600 genes, among which miRNAs, piRNAs and histone modification pathways are overrepresented. These genes mainly co-localize in two genomic regions enriched in transposable elements (TEs). CONCLUSIONS Our results suggest that the causal polymorphism(s) in the 840 kb region somehow impair downstream epigenetic and post-transcriptional regulations in obligate asexual lineages, thereby sustaining asexual reproduction.
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Affiliation(s)
- M D Huguet
- Institute for Genetics, Environment and Plant Protection, IGEPP, INRAE, Institut Agro, Univ Rennes, Le Rheu, 35653, France
| | - S Robin
- Institute for Genetics, Environment and Plant Protection, IGEPP, INRAE, Institut Agro, Univ Rennes, Le Rheu, 35653, France
- Institut National de Recherche en Informatique et en Automatique, Institut de Recherche en Informatique et Systèmes Aléatoires, Genscale, Campus Beaulieu, Rennes, 35042, France
| | - S Hudaverdian
- Institute for Genetics, Environment and Plant Protection, IGEPP, INRAE, Institut Agro, Univ Rennes, Le Rheu, 35653, France
| | - S Tanguy
- Institute for Genetics, Environment and Plant Protection, IGEPP, INRAE, Institut Agro, Univ Rennes, Le Rheu, 35653, France
| | - N Leterme-Prunier
- Institute for Genetics, Environment and Plant Protection, IGEPP, INRAE, Institut Agro, Univ Rennes, Le Rheu, 35653, France
| | - R Cloteau
- Institute for Genetics, Environment and Plant Protection, IGEPP, INRAE, Institut Agro, Univ Rennes, Le Rheu, 35653, France
| | - S Baulande
- Centre de Recherche, Genomics of Excellence Platform, Institut Curie, PSL Research University, Paris Cedex 05, France
| | - P Legoix-Né
- Centre de Recherche, Genomics of Excellence Platform, Institut Curie, PSL Research University, Paris Cedex 05, France
| | - F Legeai
- Institute for Genetics, Environment and Plant Protection, IGEPP, INRAE, Institut Agro, Univ Rennes, Le Rheu, 35653, France
- Institut National de Recherche en Informatique et en Automatique, Institut de Recherche en Informatique et Systèmes Aléatoires, Genscale, Campus Beaulieu, Rennes, 35042, France
| | - J-C Simon
- Institute for Genetics, Environment and Plant Protection, IGEPP, INRAE, Institut Agro, Univ Rennes, Le Rheu, 35653, France
| | - J Jaquiéry
- Institute for Genetics, Environment and Plant Protection, IGEPP, INRAE, Institut Agro, Univ Rennes, Le Rheu, 35653, France
| | - D Tagu
- Institute for Genetics, Environment and Plant Protection, IGEPP, INRAE, Institut Agro, Univ Rennes, Le Rheu, 35653, France
| | - G Le Trionnaire
- Institute for Genetics, Environment and Plant Protection, IGEPP, INRAE, Institut Agro, Univ Rennes, Le Rheu, 35653, France.
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Liu D, Wu C, Wang Q, Liu D, Tian Z, Liu J. Effects of heat wave on development, reproduction, and morph differentiation of Aphis glycines (Hemiptera: Aphididae). ENVIRONMENTAL ENTOMOLOGY 2023; 52:939-948. [PMID: 37542736 DOI: 10.1093/ee/nvad071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 06/10/2023] [Accepted: 07/14/2023] [Indexed: 08/07/2023]
Abstract
As global warming intensifies, heat waves occur frequently in the summer and autumn in Heilongjiang Province, northeast China. The soybean aphid, Aphis glycines Matsumura, is an important pest of soybean in the region, which faces great survival pressure due to high temperature. In this study, A. glycines fed soybean (AgFS) and wild soybean (AgFW) were exposed to diurnal 35 °C for 7 days begin at different developmental stages, and the development, reproduction, and morph differentiation were studied. When AgFS were exposed to heat waves from the second stadium to the adult stage, they performed worse in adult lifespan and fecundity than the control. When AgFW were exposed to heat waves begin at different developmental stages, the adult lifespan and reproduction period were shortened and reproduction ability decreased. When exposed to heat waves, the adult fecundity and intrinsic rate of increase in AgFW were lower than those of AgFS. Lower proportion of males were deposited on day 13, when AgFS and AgFW were exposed to diurnal 35 °C begin at different developmental stages. The results showed that heat waves lasting for 7 days were likely to be useful in the management of A. glycines, which reduced adult reproduction ability and male differentiation proportion in the offspring and significantly affected AgFW compared to AgFS. These results are important for predicting the dynamics of A. glycines in Heilongjiang, northeast China, where the local environmental temperature is increasing and heat waves occur frequently.
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Affiliation(s)
- Dailin Liu
- College of Plant Protection, Northeast Agricultural University, Changjiang Road 600, Harbin, Heilongjiang Province 150030, China
| | - Cirui Wu
- College of Plant Protection, Northeast Agricultural University, Changjiang Road 600, Harbin, Heilongjiang Province 150030, China
| | - Qi Wang
- College of Plant Protection, Northeast Agricultural University, Changjiang Road 600, Harbin, Heilongjiang Province 150030, China
| | - Donghao Liu
- College of Plant Protection, Northeast Agricultural University, Changjiang Road 600, Harbin, Heilongjiang Province 150030, China
| | - Zhenqi Tian
- College of Plant Protection, Northeast Agricultural University, Changjiang Road 600, Harbin, Heilongjiang Province 150030, China
| | - Jian Liu
- College of Plant Protection, Northeast Agricultural University, Changjiang Road 600, Harbin, Heilongjiang Province 150030, China
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Colizzi FS, Martínez-Torres D, Helfrich-Förster C. The circadian and photoperiodic clock of the pea aphid. J Comp Physiol A Neuroethol Sens Neural Behav Physiol 2023:10.1007/s00359-023-01660-8. [PMID: 37482577 DOI: 10.1007/s00359-023-01660-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 07/13/2023] [Accepted: 07/14/2023] [Indexed: 07/25/2023]
Abstract
The pea aphid, Acyrthosiphon pisum, is a paradigmatic photoperiodic species that exhibits a remarkable annual life cycle, which is tightly coupled to the seasonal changes in day length. During spring and summer, characterised by longer days, aphid populations consist exclusively of viviparous females that reproduce parthenogenetically. When autumn comes and the days shorten, aphids switch their reproductive mode and generate males and oviparous sexual females, which mate and produce cold-resistant eggs that overwinter and survive the unfavourable season. While the photoperiodic responses have been well described, the nature of the timing mechanisms which underlie day length discrimination are still not completely understood. Experiments from the 1960's suggested that aphids rely on an 'hourglass' clock measuring the elapsed time during the dark night by accumulating a biochemical factor, which reaches a critical threshold at a certain night length and triggers the switch in reproduction mode. However, the photoperiodic responses of aphids can also be attributed to a strongly dampened circadian clock. Recent studies have uncovered the molecular components and the location of the circadian clock in the brain of the pea aphid and revealed that it is well connected to the neurohormonal system controlling aphid reproduction. We provide an overview of the putative mechanisms of photoperiodic control in aphids, from the photoreceptors involved in this process to the circadian clock and the neuroendocrine system.
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Affiliation(s)
- Francesca Sara Colizzi
- University of Würzburg, Neurobiology and Genetics, Biocenter, Am Hubland, 97074, Würzburg, Germany
| | - David Martínez-Torres
- Institut de Biologia Integrativa de Sistemes, Parc Cientific Universitat de València, C/ Catedrático José Beltrán nº 2, 46980, Paterna,, València, Spain
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Aphids and Ants, Mutualistic Species, Share a Mariner Element with an Unusual Location on Aphid Chromosomes. Genes (Basel) 2021; 12:genes12121966. [PMID: 34946915 PMCID: PMC8701394 DOI: 10.3390/genes12121966] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 12/07/2021] [Accepted: 12/07/2021] [Indexed: 12/20/2022] Open
Abstract
Aphids (Hemiptera, Aphididae) are small phytophagous insects. The aim of this study was to determine if the mariner elements found in the ant genomes are also present in Aphis fabae and Aphis hederae genomes and the possible existence of horizontal transfer events. Aphids maintain a relationship of mutualism with the ants. The close contact between these insects could favour horizontal transfer events of transposable elements. Myrmar mariner element isolated from Myrmica ruginodis and Tapinoma ibericum ants have also been found in the two Aphis species: A. fabae and A. hederae (Afabmar-Mr and Ahedmar-Mr elements). Besides, Afabmar-Mr could be an active transposon. Myrmar-like elements are also present in other insect species as well as in one Crustacean species. The phylogenetic study carried out with all Myrmar-like elements suggests the existence of horizontal transfer. Most aphids have 2n = 8 with a XX-X0 sex determination system. Their complicated life cycle is mostly parthenogenetic with sexual individuals only in autumn. The production of X0 males, originated by XX females which produce only spermatozoa with one X chromosome, must necessarily occur through specialized cytogenetic and molecular mechanisms which are not entirely known. In both aphid species, the mariner elements are located on all chromosomes, including the X chromosomes. However, on the two X chromosomes, no positive signals are detected in their small DAPI-negative telomere regions. The rDNA sites are located, as in the majority of Aphids species, on one of the telomere regions of each X chromosome. The hybridization patterns obtained by double FISH demonstrate that Afabmar-Mr and Ahedmar-Mr elements do not hybridize at the rDNA sites of their host species. Possible causes for the absence of these transposons in the rDNA genes are discussed, probably related with the X chromosome biology.
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Zhou C, Li D, Shi X, Zhang J, An Q, Wu Y, Kang L, Li JQ, Pan C. Nanoselenium Enhanced Wheat Resistance to Aphids by Regulating Biosynthesis of DIMBOA and Volatile Components. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:14103-14114. [PMID: 34784717 DOI: 10.1021/acs.jafc.1c05617] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The mechanism of nanoselenium (nano-Se) improving the resistance induced by plant components to aphids is unclear. In this study, foliar sprayed nano-Se (5.0 mg/L) could significantly reduce the Sitobion avenae number (36%) compared with that in the control. Foliar application of nano-Se enhanced the antioxidant capacity by reducing malondialdehyde (MDA) and increasing GSH-Px, CAT, GSH, Pro, and VE concentrations in wheat seedlings. The phenylpropane pathway was activated by nano-Se biofortification, which increased apigenin and caffeic acid concentrations. The high-level expression of the related genes (TaBx1A, TaBx3A, TaBx4A, TaASMT2, and TaCOMT) induced the promotion of melatonin (88.6%) and 2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one (DIMBOA) (64.3%). Different ratios of the secondary metabolites to nano-Se were taken to examine the effects on resistance of wheat to S. avenae. The results revealed that the combination of nano-Se and melatonin could achieve the best overall performance by reducing the S. avenae number by 52.2%. The study suggests that the coordinated applications of nano-Se and melatonin could more effectively improve the wheat resistance to aphids via the promotion of volatile organic compound synthesis and modulation in phenylpropane and indole metabolism pathways.
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Affiliation(s)
- Chunran Zhou
- Innovation Center of Pesticide Research, Department of Applied Chemistry, College of Science, China Agricultural University, China Yuanmingyuan West Road 2, Beijing 100193, P. R. China
| | - Dong Li
- Innovation Center of Pesticide Research, Department of Applied Chemistry, College of Science, China Agricultural University, China Yuanmingyuan West Road 2, Beijing 100193, P. R. China
| | - Xinlei Shi
- Innovation Center of Pesticide Research, Department of Applied Chemistry, College of Science, China Agricultural University, China Yuanmingyuan West Road 2, Beijing 100193, P. R. China
| | - Jingbang Zhang
- Innovation Center of Pesticide Research, Department of Applied Chemistry, College of Science, China Agricultural University, China Yuanmingyuan West Road 2, Beijing 100193, P. R. China
| | - Quanshun An
- Innovation Center of Pesticide Research, Department of Applied Chemistry, College of Science, China Agricultural University, China Yuanmingyuan West Road 2, Beijing 100193, P. R. China
| | - Yangliu Wu
- Innovation Center of Pesticide Research, Department of Applied Chemistry, College of Science, China Agricultural University, China Yuanmingyuan West Road 2, Beijing 100193, P. R. China
| | - Lu Kang
- Innovation Center of Pesticide Research, Department of Applied Chemistry, College of Science, China Agricultural University, China Yuanmingyuan West Road 2, Beijing 100193, P. R. China
| | - Jia-Qi Li
- Innovation Center of Pesticide Research, Department of Applied Chemistry, College of Science, China Agricultural University, China Yuanmingyuan West Road 2, Beijing 100193, P. R. China
| | - Canping Pan
- Innovation Center of Pesticide Research, Department of Applied Chemistry, College of Science, China Agricultural University, China Yuanmingyuan West Road 2, Beijing 100193, P. R. China
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Cuti P, Barberà M, Veenstra JA, Martínez-Torres D. Progress in the characterization of insulin-like peptides in aphids: Immunohistochemical mapping of ILP4. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2021; 136:103623. [PMID: 34246764 DOI: 10.1016/j.ibmb.2021.103623] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 07/07/2021] [Accepted: 07/07/2021] [Indexed: 06/13/2023]
Abstract
Aphids were the first animals described as photoperiodic due to their seasonal switch from viviparous parthenogenesis to sexual reproduction (cyclical parthenogenesis) caused by the shortening of the photoperiod in autumn. This switch produces a single sexual generation of oviparous females and males that mate and lay diapausing cold-resistant eggs that can overcome the unfavourable environmental conditions typical of winter in temperate regions. Previous studies have hinted at a possible implication of two insulin-like peptides (ILP1 and ILP4) in the aphid seasonal response, changing their expression levels between different photoperiodic conditions. Moreover, in situ localization of their transcripts in particular neurosecretory cells (NSCs) in the aphid brain supported the idea that these neuropeptides could correspond to the formerly called virginoparin, an uncharacterized factor originally proposed to be transported directly to the aphid embryos to promote their development as parthenogenetic individuals. To further investigate the fate of these ILPs, we raised a specific antiserum against one of them (ILP4) and mapped this neuropeptide by immunohistochemistry (IHC) in Acyrthosiphon pisum and Megoura viciae aphids. Coincident with in situ localization, our results show that ILP4 is synthesized in two groups (one in each brain hemisphere) of four neurosecretory cells in the pars intercerebralis (NSC group I) and then it is transported outside the brain to the corpora cardiaca. From there, three nerves (two laterals and one medial) transport it to the abdomen. Although no precise site of release has been found, the terminations of these nerves near the germaria would be compatible with the proposal of a direct connection between group I of NSCs and the reproductive system by localized release. In addition, we detected some collateral arborizations originating from the eight NSCs going to the pars lateralis, where clock neurons and some photoreceptors have been previously localized, suggesting a possible communication between the circadian and photoperiodic systems.
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Affiliation(s)
- Paolo Cuti
- Institut de Biologia Integrativa de Sistemes, Parc Cientific, Universitat de València, C/ Catedràtic Agustín Escardino Benlloch, 9, 46980, Paterna, València, Spain
| | - Miquel Barberà
- Institut de Biologia Integrativa de Sistemes, Parc Cientific, Universitat de València, C/ Catedràtic Agustín Escardino Benlloch, 9, 46980, Paterna, València, Spain
| | - Jan A Veenstra
- Université de Bordeaux, INCIA CNRS UMR, 5287, Talence, France
| | - David Martínez-Torres
- Institut de Biologia Integrativa de Sistemes, Parc Cientific, Universitat de València, C/ Catedràtic Agustín Escardino Benlloch, 9, 46980, Paterna, València, Spain.
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EYES ABSENT and TIMELESS integrate photoperiodic and temperature cues to regulate seasonal physiology in Drosophila. Proc Natl Acad Sci U S A 2020; 117:15293-15304. [PMID: 32541062 PMCID: PMC7334534 DOI: 10.1073/pnas.2004262117] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Extracting information regarding calendar time from seasonal changes in photoperiod and temperature is critical for organisms to maintain annual cycles in physiology and behavior. Here we found that, in flies, EYES ABSENT (EYA) protein acts as a seasonal sensor by adjusting its abundance and phase in response to changes in photoperiod and temperature. We show that the manipulation of EYA levels is sufficient to impair the ability of female Drosophila to regulate seasonal variation in reproductive dormancy. Finally, our results suggest an important role for the circadian clock protein TIMELESS (TIM) in modulating EYA level through its ability to measure night length, linking the circadian clock to seasonal timing. Organisms possess photoperiodic timing mechanisms to detect variations in day length and temperature as the seasons progress. The nature of the molecular mechanisms interpreting and signaling these environmental changes to elicit downstream neuroendocrine and physiological responses are just starting to emerge. Here, we demonstrate that, in Drosophila melanogaster, EYES ABSENT (EYA) acts as a seasonal sensor by interpreting photoperiodic and temperature changes to trigger appropriate physiological responses. We observed that tissue-specific genetic manipulation of eya expression is sufficient to disrupt the ability of flies to sense seasonal cues, thereby altering the extent of female reproductive dormancy. Specifically, we observed that EYA proteins, which peak at night in short photoperiod and accumulate at higher levels in the cold, promote reproductive dormancy in female D. melanogaster. Furthermore, we provide evidence indicating that the role of EYA in photoperiodism and temperature sensing is aided by the stabilizing action of the light-sensitive circadian clock protein TIMELESS (TIM). We postulate that increased stability and level of TIM at night under short photoperiod together with the production of cold-induced and light-insensitive TIM isoforms facilitate EYA accumulation in winter conditions. This is supported by our observations that tim null mutants exhibit reduced incidence of reproductive dormancy in simulated winter conditions, while flies overexpressing tim show an increased incidence of reproductive dormancy even in long photoperiod.
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Kamruzzaman ASM, Mikani A, Mohamed AA, Elgendy AM, Takeda M. Crosstalk among Indoleamines, Neuropeptides and JH/20E in Regulation of Reproduction in the American Cockroach, Periplaneta americana. INSECTS 2020; 11:insects11030155. [PMID: 32121505 PMCID: PMC7143859 DOI: 10.3390/insects11030155] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/28/2019] [Revised: 02/25/2020] [Accepted: 02/26/2020] [Indexed: 01/29/2023]
Abstract
Although the regulation of vitellogenesis in insects has been mainly discussed in terms of ‘classical’ lipid hormones, juvenile hormone (JH), and 20-hydroxyecdysone (20E), recent data support the notion that this process must be adjusted in harmony with a nutritional input/reservoir and involvement of certain indoleamines and neuropeptides in regulation of such process. This study focuses on crosstalks among these axes, lipid hormones, monoamines, and neuropeptides in regulation of vitellogenesis in the American cockroach Periplaneta americana with novel aspects in the roles of arylalkylamine N-acetyltransferase (aaNAT), a key enzyme in indoleamine metabolism, and the enteroendocrine peptides; crustacean cardioactive peptide (CCAP) and short neuropeptide F (sNPF). Double-stranded RNA against aaNAT (dsRNAaaNAT) was injected into designated-aged females and the effects were monitored including the expressions of aaNAT itself, vitellogenin 1 and 2 (Vg1 and Vg2) and the vitellogenin receptor (VgR) mRNAs, oocyte maturation and changes in the hemolymph peptide concentrations. Effects of peptides application and 20E were also investigated. Injection of dsRNAaaNAT strongly suppressed oocyte maturation, transcription of Vg1, Vg2, VgR, and genes encoding JH acid- and farnesoate O-methyltransferases (JHAMT and FAMeT, respectively) acting in the JH biosynthetic pathway. However, it did not affect hemolymph concentrations of CCAP and sNPF. Injection of CCAP stimulated, while sNPF suppressed oocyte maturation and Vgs/VgR transcription, i.e., acting as allatomedins. Injection of CCAP promoted, while sNPF repressed ecdysteroid (20E) synthesis, particularly at the second step of Vg uptake. 20E also affected the JH biosynthetic pathway and Vg/VgR synthesis. The results revealed that on the course of vitellogenesis, JH- and 20E-mediated regulation occurs downstream to indoleamines- and peptides-mediated regulations. Intricate mutual interactions of these regulatory routes must orchestrate reproduction in this species at the highest potency.
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Affiliation(s)
- A. S. M. Kamruzzaman
- Department of Agrobioscience, Graduate School of Agricultural Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe 657-8501, Japan;
| | - Azam Mikani
- Department of Entomology, Faculty of Agriculture, Tarbiat Modares University, Tehran 14115-336, Iran;
| | - Amr A. Mohamed
- Department of Entomology, Faculty of Science, Cairo University, Giza 12613, Egypt;
- Correspondence: (A.A.M.); (M.T.); Tel.: +2-0106-943-1998 (A.A.M.); +81-78-982-2531/070-4425-68319 (M.T.)
| | - Azza M. Elgendy
- Department of Entomology, Faculty of Science, Cairo University, Giza 12613, Egypt;
| | - Makio Takeda
- Department of Agrobioscience, Graduate School of Agricultural Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe 657-8501, Japan;
- Correspondence: (A.A.M.); (M.T.); Tel.: +2-0106-943-1998 (A.A.M.); +81-78-982-2531/070-4425-68319 (M.T.)
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