http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Mirza Hasanuzzaman (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
-
Mirza Hasanuzzaman,Hirosuke Oku,Kamrun Nahar,M. H. M. Borhannuddin Bhuyan,Jubayer Al Mahmud,Frantisek Baluska,Masayuki Fujita 한국식물생명공학회 2018 Plant biotechnology reports Vol.12 No.2
Nitric oxide (NO), a non-charged, small, gaseous free-radical, is a signaling molecule in all plant cells. Several studies have proposed multifarious physiological roles for NO, from seed germination to plant maturation and senescence. Nitric oxide is thought to act as an antioxidant, quenching ROS during oxidative stress and reducing lipid peroxidation. NO also mediates photosynthesis and stomatal conductance and regulates programmed cell death, thus providing tolerance to abiotic stress. In mitochondria, NO participates in the electron transport pathway. Nitric oxide synthase and nitrate reductase are the key enzymes involved in NO-biosynthesis in aerobic plants, but non-enzymatic pathways have been reported as well. Nitric oxide can interact with a broad range of molecules, leading to the modification of protein activity, GSH biosynthesis, S-nitrosylation, peroxynitrite formation, proline accumulation, etc., to sustain stress tolerance. In addition to these interactions, NO interacts with fatty acids to form nitro-fatty acids as signals for antioxidant defense. Polyamines and NO interact positively to increase polyamine content and activity. A large number of genes are reprogrammed by NO; among these genes, proline metabolism genes are upregulated. Exogenous NO application is also shown to be involved in salinity tolerance and/ or resistance via growth promotion, reversing oxidative damage and maintaining ion homeostasis. This review highlights NO-mediated salinity-stress tolerance in plants, including NO biosynthesis, regulation, and signaling. Nitric oxide-mediated ROS metabolism, antioxidant defense, and gene expression and the interactions of NO with other bioactive molecules are also discussed. We conclude the review with a discussion of unsolved issues and suggestions for future research.
-
Hasanuzzaman, Mirza,Hossain, Mohammad Anwar,Fujita, Masayuki The Korean Society of Plant Biotechnology 2011 Plant biotechnology reports Vol.5 No.4
The present study investigates the possible regulatory role of exogenous nitric oxide (NO) in antioxidant defense and methylglyoxal (MG) detoxification systems of wheat seedlings exposed to salt stress (150 and 300 mM NaCl, 4 days). Seedlings were pre-treated for 24 h with 1 mM sodium nitroprusside, a NO donor, and then subjected to salt stress. The ascorbate (AsA) content decreased significantly with increased salt stress. The amount of reduced glutathione (GSH) and glutathione disulfide (GSSG) and the GSH/GSSG ratio increased with an increase in the level of salt stress. The glutathione S-transferase (GST) activity increased significantly with severe salt stress (300 mM). The ascorbate peroxidase (APX), monodehydroascorbate reductase (MDHAR), dehydroascorbate reductase (DHAR), catalase (CAT) and glutathione peroxidase (GPX) activities did not show significant changes in response to salt stress. The glutathione reductase (GR), glyoxalase I (Gly I), and glyoxalase II (Gly II) activities decreased upon the imposition of salt stress, especially at 300 mM NaCl, with a concomitant increase in the $H_2O_2$ and lipid peroxidation levels. Exogenous NO pretreatment of the seedlings had little influence on the nonenzymatic and enzymatic components compared to the seedlings of the untreated control. Further investigation revealed that NO pre-treatment had a synergistic effect; that is, the pre-treatment increased the AsA and GSH content and the GSH/GSSG ratio, as well as the activities of MDHAR, DHAR, GR, GST, GPX, Gly I, and Gly II in most of the seedlings subjected to salt stress. These results suggest that the exogenous application of NO rendered the plants more tolerant to salinity-induced oxidative damage by enhancing their antioxidant defense and MG detoxification systems.
-
Md. Mahabub Alam,Masayuki Fujita,Kamrun Nahar,Mirza Hasanuzzaman 한국식물생명공학회 2014 Plant biotechnology reports Vol.8 No.3
This study examined the ability of jasmonicacid (JA) to enhance drought tolerance in different Brassicaspecies in terms of physiological parameters, antioxidantsdefense, and glyoxalase system. Ten-day-oldseedlings were exposed to drought (15 % polyethyleneglycol, PEG-6000) either alone or in combination with0.5 mM JA. Drought significantly increased lipoxygenaseactivity and oxidative stress, levels of malondialdehyde andH2O2. Drought reduced seedling biomass, chlorophyll (chl)content, and leaf relative water content (RWC). Droughtincreased proline, oxidized ascorbate (DHA) and glutathionedisulfide (GSSG) levels. Drought affected differentspecies differently: in B. napus, catalase (CAT) and glyoxalaseII (Gly II) activities were decreased, while glutathione-S-transferase (GST) and glutathione peroxidase(GPX) activities were increased in drought-stressed comparedto unstressed plants; in B. campestris, activities ofglutathione reductase (GR), glyoxalase I (Gly I), GST, andGPX were increased, monodehydroascorbate reductase(MDHAR), dehydroascorbate reductase (DHAR), CAT andother enzymes were decreased; in B. juncea, activities ofascorbate peroxidase, GR, GPX, Gly I were increased; GlyII activity was decreased and other enzymes did notchange. Spraying drought-stressed seedlings with JAincreased GR and Gly I activities in B. napus; increasedMDHAR activity in B. campestris; and increased DHAR,GR, GPX, Gly I and Gly II activities in B. juncea. JAimproved fresh weight, chl, RWC in all species, dry weightincreased only in B. juncea. Brassica juncea had the lowestoxidative stress under drought, indicating its naturaldrought tolerance capacity. The JA improved drought toleranceof B. juncea to the highest level among studiedspecies.
-
Regulation of cuticular wax biosynthesis in plants under abiotic stress
Md Shaheenuzzamn,Shandang Shi,Kamran Sohail,Hongqi Wu,Tianxiang Liu,Peipei An,Zhonghua Wang,Mirza Hasanuzzaman 한국식물생명공학회 2021 Plant biotechnology reports Vol.15 No.1
Cuticular waxes are the covering of the outer layer of the plant, consist of hydrocarbon appears like whitish flm or bloom in plant organs. They play a vital role like a safeguard from diferent stress condition in the plant. Since environmental factors are active regulators of cuticular wax biosynthesis, composition, quantity, and deposition, it is evident that cuticular wax is associated with plant stress responses. The diversity of cuticular wax compositions is a proof of the wealth of genes associated in plant wax production. Moreover, a number of wax genes were distinguished in plant/crops at abiotic stress conditions but, regulation of control of those wax genes has not been studied very well in major crop plants at abiotic conditions. A very few transcriptions factors were identifed to regulate the expression level of wax genes of cuticular wax biosynthesis at abiotic stress condition. However, further study is needed to identify more candidate transcriptional regulation factors to cuticular wax production in diferent crop plants in diverse abiotic environments. Therefore, regulation of cuticular wax production under diverse abiotic stresses and the role of transcription factors into the plant cuticular wax accumulation will be helpful to engineer crop plants and improve transgenic crops for stress tolerance. In this review, we focused on a new perspective on transcriptional factors to regulate functional genes of cuticular wax biosynthesis in plants at abiotic stresses.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
