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Regulation of 2-acetyl-1-pyrroline and grain quality in early-season indica fragrant rice by nitrogen and silicon fertilization under different plantation methods

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Journal of Integrative Agriculture 2024年第2期23卷 511-535页

作者： Yongjian Chen Lan Dai Siren Cheng Yong Ren Huizi Deng Xinyi Wang Yuzhan Li Xiangru Tang Zaiman Wang Zhaowen Mo State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources College of AgricultureSouth China Agricultural UniversityGuangzhou 510642China Guangxi Key Laboratory of Agricultural Resources Chemistry and Biotechnology Yulin Normal UniversityYulin 537000China Key Laboratory for Conservation and Utilization of Subtropical Bio-Resources Education Department of Guangxi Zhuang Autonomous Region/College of Biology and PharmacyYulin Normal UniversityYulin 537000China Scientific Observing and Experimental Station of Crop Cultivation in South China Ministry of Agriculture and Rural AffairsGuangzhou 510642China Guangzhou Key Laboratory for Science and Technology of fragrant rice Guangzhou 510642China Key Laboratory of Key Technology for South Agricultural Machine and Equipment Ministry of Education/College of EngineeringSouth China Agricultural UniversityGuangzhou 510642China

fragrant rice has a high market value,and it is a popular rice type among consumers owing to its pleasant *** methods,nitrogen(N)fertilizers,and silicon(Si)fertilizers can affect the grain yield and fragrance of fragrant ***,the core commercial rice production attributes,namely the head rice yield(HRY)and 2-acetyl-1-pyrroline(2-AP)content of fragrant rice,under various nitrogen and silicon(N-Si)fertilization levels and different plantation methods remain *** field experiment in this study was performed in the early seasons of 2018 and 2019 with two popular indica fragrant rice cultivars(Yuxiangyouzhan and Xiangyaxiangzhan).They were grown under six N-Si fertilization treatments(combinations of two levels of Si fertilizer,0 kg Si ha^(−1)(Si0)and 150 kg Si ha^(−1)(Si1),and three levels of N fertilizer,0 kg N ha^(−1)(N0),150 kg N ha^(−1)(N1),and 220 kg N ha^(−1)(N2))and three plantation methods(artificial transplanting(AT),mechanical transplanting(MT),and mechanical direct-seeding(MD)).The results showed that the N-Si fertilization treatments and all the plantation methods significantly affected the HRY and 2-AP content and related parameters of the two different fragrant rice *** with the Si0N0 treatment,the N-Si fertilization treatments resulted in higher HRY and 2-AP *** rates of brown rice,milled rice,head rice,and chalky rice of the fragrant rice also improved with the N-Si fertilization *** N-Si fertilization treatments increased the activities of N metabolism enzymes and the accumulation of N and Si in various parts of the fragrant rice,and affected their antioxidant response *** key parameters for the HRY and 2-AP content were assessed by redundancy ***,the structural equation model revealed that the Si and N accumulation levels indirectly affected the HRY by affecting the N metabolism enzyme activity,N use efficiency,and grain quality of fragrant ***,high N

关键词： fragrant rice 2-AP content head rice yield mechanical planting nitrogen silicon

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Epoxiconazole Improved Photosynthesis,Yield Formation,Grain Quality and 2-Acetyl-1-Pyrroline Biosynthesis of fragrant rice

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rice science 2022年第2期29卷 189-196页

作者： LUO Haowen HE Longxin DU Bin PAN Shenggang MO Zhaowen YANG Shuying ZOU Yingbin TANG Xiangru State Key Laboratory for Conservation and Utilization of Subtropical Agricultural Bioresources South China Agricultural UniversityGuangzhou 510642China Scientific Observing and Experimental Station of Crop Cultivation in South China Ministry of Agriculture and Rural AffairsGuangzhou 510642China Guangzhou Key Laboratory for Science and Technology of Aromatic rice Guangzhou 510642China College of Agronomy Hunan Agricultural UniversityChangsha 410128China

Epoxiconazole is a triazole ***,the effects of epoxiconazole on crop productivity and quality were rarely *** this study,we investigated the effects of epoxiconazole application on yield formation,grain quality attributes,and 2-acetyl-1-pyrroline(2-AP)content in fragrant rice.A three-year field experiment was carried out with a fragrant rice variety,Meixiangzhan *** the heading stage,0,0.02,0.04,0.08,0.16 and 0.32 g/L epoxiconazole solutions were foliar applied to fragrant rice plants,*** results showed that epoxiconazole application significantly increased grain yield,seed-setting rate and 1000-grain *** content and net photosynthetic rate of fragrant rice during the grain-filling stage significantly increased due to epoxiconazole *** application of epoxiconazole at 0.08 g/L increased grain protein content and decreased both chalky rice rate and chalkiness area ratio of fragrant *** also substantially increased grain 2-AP content by inducing the regulation in contents of related synthetic precursors,including proline,pyrroline-5-carboxylic acid,Δ1-pyrroline and ***,foliar application of epoxiconazole could be used for the improvement in grain yield,grain quality and 2-AP content in fragrant rice production when applied concentration at 0.08-0.32 g/*** findings provided the new roles of epoxiconazole in crop production.

关键词： epoxiconazole fragrant rice 2-acetyl-1-pyrroline yield formation grain quality

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Enhancement of Ultrasonic Seed Treatment on Yield,Grain Quality Characters,and 2-Acetyl-1-Pyrroline Biosynthesis in Different fragrant rice Genotypes

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Phyton-International Journal of Experimental Botany 2022年第11期91卷 2461-2473页

作者： Rujian Lan Meiyang Duan Feida Wu Rifang Lai Zhaowen Mo Shenggang Pan Xiangru Tang State Key Laboratory for Conservation and Utilization of Subtropical Agricultural Bioresources South China Agricultural UniversityGuangzhou510642China Scientific Observing and Experimental Station of Crop Cultivation in South China Ministry of AgricultureGuangzhou510642China Guangzhou Key Laboratory for Science and Technology of Aromatic rice Guangzhou510642China

fragrant rice is popular for the good grain quality and special *** present study conducted a field experiment to investigate the effects of ultrasonic seed treatment on grain yield,quality characters,physiological properties and aroma biosynthesis of different fragrant rice *** seeds of three fragrant rice genotypes were exposed to 1 min of ultrasonic vibration and then cultivated in paddy *** results of present study showed that ultrasonic seed treatment increased grain yield of all fragrant rice genotypes but the responses of yield formation to ultrasonic were varied with different *** with control,ultrasonic seed treatment increased grain 2-acetyl-1-pyrroline(2-AP,the key component of fragrant rice aroma)content by 13.40%–44.88%.Ultrasonic seed treatment also reduced the crude protein contents in *** head rice rate,rice length,chalky rice rate,and chalkiness degree were influenced by ultrasonic for one or two fragrant rice *** activities of peroxidase and superoxide dismutase were also enhanced due to ultrasonic seed *** conclusion,ultrasonic seed treatment increased grain,regulated grain aroma and quality,and improved stress resistance of fragrant rice varieties.

关键词： fragrant rice yield formation crop growth grain quality 2-acetyl-1-pyrroline

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Foliar Application of Brassinolide Induced Regulation of Grain Yield and Quality,Antioxidant Responses and Aroma in fragrant rice

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Phyton-International Journal of Experimental Botany 2022年第5期91卷 1061-1071页

作者： Jinhai Liu Rifang Lai Longxin He Pipeng Xing Haowen Luo Shuying Yang Yingbin Zou Xiangru Tang State Key Laboratory for Conservation and Utilization of Subtropical Agricultural Bioresources South China Agricultural UniversityGuangzhou510642China Scientific Observing and Experimental Station of Crop Cultivation in South China Ministry of AgricultureGuangzhou510642China Guangzhou Key Laboratory for Science and Technology of Aromatic rice Guangzhou510642China College of Agronomy Hunan Agricultural UniversityChangsha410128China

Brassinolide(BR)is a new green plant growth *** present field study was conducted on two fragrant rice cultivars(i.e.,Meixiangzhan-2 and Xiangyaxiangzhan)to study the effects of foliar application of BR on fragrant rice *** the heading stage,BR solutions at 0.05,0.15,0.25 and 0.50 mg L-1 were sprayed on fragrant rice at 600 liters per hectare;these treatments were named as BR1,BR2,BR3 and BR4,*** treatment sprayed with distilled water was taken as a control(CK).Compared with CK,the BR2 treatment significantly enhanced the chlorophyll concentration and net photosynthetic rate for Meixiangzhan-2,and *** BR3 and BR4 treatments increased the concentrations of chlorophyll a,chlorophyll b and carotenoid,and also enhanced net photosynthetic rate by 31.91%and 40.43%,*** grain yields were recorded in the BR2 treatment than on CK on Meixiangzhan-2,while on Xiangyaxiangzhan,the BR3 and BR4 treatments increased grain yield compared with *** relation to CK,higher head rice rates were recorded in the BR2 treatment for Meixiangzhan-2,and in the BR3 and BR4 treatments for *** treatments(BR2 for Meixiangzhan-2,BR3 and BR4 for Xiangyaxiangzhan)also significantly enhanced the activities of GPX,SOD and CAT by 10.22%to 23.00%,and reduced the malonaldehyde *** addition,we observed that some BR treatments(BR2 for Meixiangzhan-2,BR3 and BR4 for Xiangyaxiangzhan)decreased the grain 2-acetyl-1-pyrroline concentration of fragrant rice.

关键词： Brassinolide chlorophyll yield formation fragrant rice antioxidant enzyme

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Effects of Different Vermicompost Rates on Growth,2-Acetyl-1-Pyrroline,Photosynthesis and Antioxidant Responses of fragrant rice(Oryza sativa L.)Seedling

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Phyton-International Journal of Experimental Botany 2021年第4期90卷 1273-1283页

作者： Shaoyi Ruan Haowen Luo Xiaoyan Zeng Runhao Wen Feida Wu Xiangru Tang State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources College of AgricultureSouth China Agricultural UniversityGuangzhou510642China Scientific Observing and Experimental Station of Crop Cultivation in South China Ministry of Agriculture and Rural AffairsGuangzhou510642China Guangzhou Key Laboratory for Science and Technology of fragrant rice Guangzhou510642China

Vermicompost is an organic fertilizer contains multiple nutrient ***,the application of vermicompost in fragrant rice production is rarely *** order to study the effects of vermicompost application on fragrant rice(Oryza sativa L.)seedling performances,present study was conducted with two fragrant rice cultivars and four vermicompost rate treatments(0(CK),2.5(Wo1),5.0(Wo2)and 10.0(Wo3)g kg−1).The results showed that vermicompost treatments significantly increased dry weight of fragrant rice seedling by 8.31–32.56%compared with CK.21.10–59.13%higher net photosynthetic rates and 10.66–59.16%higher chlorophyll contents(chlorophyll a,chlorophyll b and total chlorophyll)were recorded in vermicompost treatments than *** of vermicompost also significantly increased 2-acetyl-1-pyrroline(2-AP,the key compound of fragrant rice aroma)content and reduced the transcript level of gene BADH2 which related to 2-AP biosynthesis in fragrant rice ***,compared with CK,vermicompost treatments enhanced activities of superoxide dismutase,peroxidase,catalase by 24.42–28.66%,24.98–25.73%and 22.45–23.57%,respectively.11.54–40.53%lower malonaldehyde contents were recorded in vermicompost treatments in related to *** conclusion,vermicompost improved growth,increased 2-AP content and might enhance stress resistant of fragrant rice seedling.

关键词： 2-acetyl-1-pyrroline fragrant rice gene expression photosynthesis vermicompost

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Grain Yield, Quality and 2-Acetyl-1-Pyrroline of fragrant rice in Response to Different Planting Seasons in South China

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Phyton-International Journal of Experimental Botany 2020年第3期89卷 705-714页

作者： Leilei Kong Haowen Luo Zhaowen Mo Shenggang Pan Zhixia Liu Qiang Zhang Song Bai Xiangru Tang Department of Crop Science and Technology College of AgricultureSouth China Agricultural UniversityGuangzhou510642China rice Research Institute Guangdong Academy of Agricultural SciencesGuangdong Provincial Key Laboratory of New Technology in Rice BreedingGuangzhou510640China

Climate conditions is an important factor affected the fragrant rice growth and *** order to study the effects of different planting seasons on fragrant rice performance in South China,present study was conducted with three planting seasons(early season(April to July),middle season(June to September)and late season(August to November))and three fragrant rice cultivars,‘Basmati-385’,‘Meixiangzhan-2’and‘Xiangyaxiangzhan’.The results showed that the highest grain yield and grain 2-acetyl-1-pyrroline(2-AP,key component of fragrant rice aroma)content were both recorded in late season treatment while the fragrant rice in middle season treatment produced the lowest grain yield,grain filling percentage,1000-grain weight and gain 2-AP *** highest contents of precursors(proline,pyrroline-5-carboxylic acid and 1-pyrro-line)which related to 2-AP biosynthesis were recorded in late season treatment compared with early season treatment and middle season *** highest activities of enzymes(proline dehydrogenase,pyrroline-5-carboxylic acid synthetase and ornithine transaminase)which involved in 2-AP biosynthesis were also observed in late season ***,the fragrant rice cultivars in late season possessed the lowest chalk rice rate,chalkiness as well as the highest brown rice rate,head rice and protein ***,the optimal season for fragrant rice production in South China is the late season.

关键词： 2-acetyl-1-pyrroline climate fragrant rice grain qulity yield formation

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Nutrient Management in fragrant rice: A Review

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Agricultural Sciences 2021年第12期12卷 1538-1554页

作者： Newton Chandra Paul Mst. Tamanna Tasmim Shahin Imran Md. Asif Mahamud Jotirmoy Chakrobortty Rakibul Hasan Md. Rabbi Shubroto Kumar Sarkar Swapan Kumar Paul Department of Agronomy Khulna Agricultural University Khulna Bangladesh Department of Horticulture Bangladesh Agricultural University Mymensingh Bangladesh Department of Agricultural Chemistry Khulna Agricultural University Khulna Bangladesh Department of Soil Science Khulna Agricultural University Khulna Bangladesh Department of Agronomy Bangladesh Agricultural University Mymensingh Bangladesh

rice (Oryza sativa L.) is the most important cereal food grain crop and is consumed by the majority of the world’s human population. Among all cultivars, fragrant/aromatic rice is preferred by the better part of the human population because of its aroma, taste and cooking quality. But most of the fragrant rice varieties are low yielding and easily sensitive to the surrounding environmental condition. Among different agronomic performances, proper nutrient management can improve the yield of fragrant rice not only by giving the required amount of nutrients but also by maintaining the health of the soil and the quality of the produce. In most cases, traditional agricultural practices degraded soil health and increased environmental pollution which leads to inferior grain quality. On the other hand, excessive application of chemical fertilizers reduced the nutrient status of the soil and badly affected the soil productivity and environmental stability. Therefore, a suitable approach of nutrient management is required to keep the production of fragrant rice to a notable amount and increase the nutrient use efficiency of soil. Application of manures and fertilizers in an appropriate dose which is the main object of nutrient management is required for its utmost importance in the growth and development of the crop that finally results in better yield and grain quality. Therefore, nutrient management is an important aspect in aromatic rice production to attain sustainable grain yield and high economic return with better quality of produce.

关键词： Nutrient Management fragrant rice Growth Yield Grain Quality

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Sequence Mutation of Exon 7 of Badh2 Gene and Aroma Identification of fragrant rice Varieties

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Agricultural Biotechnology 2020年第5期9卷 5-8页

作者： Qingjie TANG Jianxiao CHEN Liqiong TANG Yisheng HAN Xiaowei YAN Cereal Crops Institute Hainan Academy of Agricultural Sciences/Key Laboratory of Crop Genetics and Breeding of Hainan ProvinceHaikou 571100China

In this study,we performed amplificaion and sequence analysis of exon7 of gene Badh2 of 12 fragrant rice materials,and identified the aroma of fragrant rice materials by the method of seed chewing and KOH soaking,so as to analyze the sequence mutation of exon 7 in the Badh2 gene of rice material and its corresponding relation with the flavor *** results showed that an 8 bp deletion(aaaa--t---ggc)and a mutation of SNP(g→t)in exon 7 of Badh2 gene were found in 10 materials,including Xiangnuo,Lvjinxiang,Meixiangzhan 2,Huaxiang,Yuexiangxuan 1,Hongyuxiang,Meixiangxuan 1,Baxiangxuan 1,Taixiangxuan 1,Taixiangxuan *** mutation was consistent with the mutation of EU155083 sequence in GenBank and was reported for the first time in Chinese rice *** these 10 fragrant rice materials with mutation,Huaxiang and Meixiangxuan 1 were identified as the heterozygote genotype,and Hongyuxiang was identified as non-fragrant rice,so the sequence mutation in exon 7 of Badh2 gene in fragrant rice materials did not correspond to aroma traits one by one;and 7 materials were identified as fragrant rice,and the brown rice of Meixiangzhan 2 and Yuexiangyuan 1 had sweet *** results could provide a reference for the research on the genetic mechanism of rice aroma character and the promotion of fragrant rice varieties.

关键词： fragrant rice Badh2 Sequence mutation Aroma identification

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Novel Deletion in Exon 7 of Betaine Aldehyde Dehydrogenase 2(BADH2)

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rice science 2023年第2期30卷 104-112,I0020-I0030页

作者： VAN Quoc Giang HUYNH Ky NGUYEN Chau Thanh Tung NGUYEN Loc Hien NGUYEN van Manh NGUYEN Nhut Thanh VO Cong Thanh SWEE Keong Yeap College of Agriculture Can Tho UniversityCan Tho 92000Vietnam Department of Sciences and Technology of Long An Province Long An 850000Vietnam China-Association of Southeast Asian Nations College of Marine Sciences Xiamen University MalaysiaSepang 49000SelangorMalaysia

The fragrance of rice is one of the premium characteristics that breeders want to include in rice varieties due to the higher market value. Nucleotide deletions in exons 2(7 bp) and 7(8 bp) of Betaine Aldehyde Dehydrogenase 2(BADH2) are associated with fragrance in rice. In this study, a new 13 bp deletion in exon 7 of the BADH2 gene was discovered in the Nang Thom Cho Dao(NTCD) variety, and the mutation has been closely related to the genetic background of indica subspecies through the Bayesian phylogenetic approach and haplotype network analysis of the 3 000 rice Genomes Project. In addition, a set of functional markers(EX07-13F, EX07-13RN, and EX07-13RM) identified the 13 bp deletion only within NTCD(no amplified band) compared with both non-aromatic and other aromatic rice varieties(110 bp band). The deletion of 13 bases instead of 8 bases in exon 7 of BADH2 caused a premature stop codon, which down-regulated the expression of the BADH2 transcript while associated with up-regulation of OsP5CS and the high amount of 2-acetyl-1-pyrroline. It is potential to use the deletion in exon 7 of the BADH2 gene as a novel marker for adulteration and breeding of fragrant rice varieties, particularly for NTCD.

关键词： novel deletion BADH2 fragrant rice functional marker

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