scholarly journals Effect of drought stress during soybean R2-R6 growth stages on sucrose metabolism and its transport from leaf to seed

2019 ◽  
Author(s):  
Yanli Du ◽  
Qiang Zhao ◽  
Liru Chen ◽  
Xingdong Yao ◽  
Huijun Zhang ◽  
...  
Keyword(s):  
Drought Stress ◽  
Seed Development ◽  
Seed Weight ◽  
Carbon Assimilation ◽  
Sucrose Metabolism ◽  
Seed Formation ◽  
Seed Filling ◽  
Expression Levels ◽  
Early Seed Development ◽  
Assimilation Capacity

Abstract Background Sucrose is the main photosynthesis product of plants and the fundamental carbon skeleton monomer and energy supply for seed formation and development. Drought stress induces decreased photosynthetic carbon assimilation capacity and seriously affects seed weight in soybean. However, little is known about the relationship between decreases in soybean seed yield and disruption of sucrose metabolism and transport balance in leaves and seeds during the reproductive stages of crop growth.Results Three soybean cultivars with similar growth periods, ‘Shennong17’, ‘Shennong8’, and ‘Shennong12’ were subjected to drought stress during reproductive growth for 45 days. Drought stress significantly reduced leaf photosynthetic rate, shoot biomass, and seed weight. Drought stress changed the distribution of carbon assimilation products in leaves, thus decreasing starch content and increasing soluble sugar content. Drought stress increased the activities of sucrose phosphate synthase, sucrose synthase, and acid invertase enzymes, and up-regulated the expression levels of GmSPS1 , GmSuSy2 , and GmA-INV in leaves. Drought stress decreased the contents of starch, fructose, and glucose in seeds during the late seed filling stages, while it induced sucrose accumulated, which resulted in a decreased hexose-to-sucrose ratio. In developing seeds, the activities of sucrose synthesis and decomposition enzymes and the expression levels of genes related to metabolism were enhanced during early seed development under drought stress; however, under prolonged drought stress, all of them decreased. The expression levels of sucrose transporter genes in seeds were up-regulated under drought stress during early seed development, but down-regulated in leaves and seeds during the middle and late seed filling stages.Conclusion These results demonstrated that drought stress enhances the capacity for unloading sucrose into seeds and activated sucrose metabolism in seeds during early seed development. At the middle and late seed filling stages, sucrose flow from leaves to seeds was diminished, and the balance of sucrose metabolism was impaired in seeds, resulting in seed mass reduction. The different regulation strategies in sucrose allocation, metabolism, and transport during different seed development stages may be one of the physiological mechanisms for soybean plants to resist drought stress.

scholarly journals Effect of Drought Stress during Soybean R2–R6 Growth Stages on Sucrose Metabolism in Leaf and Seed

2020 ◽  
Vol 21 (2) ◽  
pp. 618 ◽  
Author(s):  
Yanli Du ◽  
Qiang Zhao ◽  
Liru Chen ◽  
Xingdong Yao ◽  
Huijun Zhang ◽  
...  
Keyword(s):  
Drought Stress ◽  
Seed Development ◽  
Seed Weight ◽  
Sucrose Metabolism ◽  
Growth Stages ◽  
Seed Formation ◽  
Seed Filling ◽  
Expression Levels ◽  
Early Seed Development ◽  
Assimilation Capacity

Sucrose is the main photosynthesis product of plants and the fundamental carbon skeleton monomer and energy supply for seed formation and development. Drought stress induces decreased photosynthetic carbon assimilation capacity, and seriously affects seed weight in soybean. However, little is known about the relationship between decreases in soybean seed yield and disruption of sucrose metabolism and transport balance in leaves and seeds during the reproductive stages of crop growth. Three soybean cultivars with similar growth periods, “Shennong17”, “Shennong8”, and “Shennong12”, were subjected to drought stress during reproductive growth for 45 days. Drought stress significantly reduced leaf photosynthetic rate, shoot biomass, and seed weight by 63.93, 33.53, and 41.65%, respectively. Drought stress increased soluble sugar contents, the activities of sucrose phosphate synthase, sucrose synthase, and acid invertase enzymes, and up-regulated the expression levels of GmSPS1, GmSuSy2, and GmA-INV, but decreased starch content by 15.13% in leaves. Drought stress decreased the contents of starch, fructose, and glucose in seeds during the late seed filling stages, while it induced sucrose accumulation, which resulted in a decreased hexose-to-sucrose ratio. In developing seeds, the activities of sucrose synthesis and degradation enzymes, the expression levels of genes related to metabolism, and the expression levels of sucrose transporter genes were enhanced during early seed development under drought stress; however, under prolonged drought stress, all of them decreased. These results demonstrated that drought stress enhances the capacity for unloading sucrose into seeds and activated sucrose metabolism during early seed development. At the middle and late seed filling stages, sucrose flow from leaves to seeds was diminished, and the balance of sucrose metabolism was impaired in seeds, resulting in seed mass reduction. The different regulation strategies in sucrose allocation, metabolism, and transport during different seed development stages may be one of the physiological mechanisms for soybean plants to resist drought stress.

Quantitative phosphoproteomic analysis of early seed development in rice (Oryza sativa L.)

2015 ◽  
Vol 90 (3) ◽  
pp. 249-265 ◽  
Author(s):  
Jiehua Qiu ◽  
Yuxuan Hou ◽  
Xiaohong Tong ◽  
Yifeng Wang ◽  
Haiyan Lin ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Seed Development ◽  
Oryza Sativa L ◽  
Early Seed Development

The amino acid permease AAP8 is important for early seed development in Arabidopsis thaliana

Planta ◽  
2007 ◽  
Vol 226 (4) ◽  
pp. 805-813 ◽  
Author(s):  
Roberto Schmidt ◽  
Harald Stransky ◽  
Wolfgang Koch
Keyword(s):  
Arabidopsis Thaliana ◽  
Amino Acid ◽  
Seed Development ◽  
Amino Acid Permease ◽  
Early Seed Development

scholarly journals Arabidopsis LORELEI, a Maternally Expressed Imprinted Gene, Promotes Early Seed Development

2017 ◽  
Vol 175 (2) ◽  
pp. 758-773 ◽  
Author(s):  
Yanbing Wang ◽  
Tatsuya Tsukamoto ◽  
Jennifer A. Noble ◽  
Xunliang Liu ◽  
Rebecca A. Mosher ◽  
...  
Keyword(s):  
Seed Development ◽  
Imprinted Gene ◽  
Early Seed Development

scholarly journals Effects of Iron and Zinc Spray on Yield and Yield Components of Wheat (Triticum Aestivum L.) in Drought Stress

2013 ◽  
Vol 46 (1) ◽  
pp. 23-32 ◽  
Author(s):  
F. Monjezi ◽  
F. Vazin ◽  
M. Hassanzadehdelouei
Keyword(s):  
Drought Stress ◽  
Seed Yield ◽  
Yield Components ◽  
Block Design ◽  
Control Treatment ◽  
Yield Reduction ◽  
Irrigation Level ◽  
Seed Filling ◽  
Yield And Yield Components ◽  
Iron And Zinc

Abstract In hot and arid regions, drought stress is considered as one of the main reasons for yield reduction. To study the effect of drought stress, iron and zinc spray on the yield and yield components of wheat, an experiment was carried out during the crop seasons of 2010 and 2011 on Shahid Salemi Farm in Ahwaz as a split factorial within randomized complete block design with three replications. The main plots with irrigation factor and three levels were considered: Level A) full irrigation, Level B) stopping irrigation at pollination step, and Level C) stopping irrigation at the seed filling stage. Subsidiary plots were considered with and without iron and zinc spray. Influencing the seed filling process, in interaction with iron, wich is an important leaf's chlorophyll cation, zinc increased the seed yield. The drought stress reduced the thousand kernels weight (TKW) and the number of seeds per spike increased about 24% and 8.5% more than the one of control treatment, respectively. Using iron, as compared with control treatment, causes the increase of thousand kernels weight from 45.71 to 46.83 grams and the increase of spike from 49.51 to 51.73. Zinc spray increased seed yield and thousand kernels weight. The results obtained from the present research showed that iron and zinc spray has fairly improved the effects caused by drought stress.

scholarly journals Genome-wide analysis of autophagy-related genes in Medicago truncatula highlights their roles in seed development and response to drought stress

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Mingkang Yang ◽  
Liping Wang ◽  
Chumin Chen ◽  
Xu Guo ◽  
Chuanglie Lin ◽  
...  
Keyword(s):  
Drought Stress ◽  
Seed Development ◽  
Medicago Truncatula ◽  
Interaction Network ◽  
Abiotic Stress Response ◽  
Biotic And Abiotic Stress ◽  
Comprehensive Overview ◽  
Network Analyses ◽  
Atg Genes ◽  
Gene Structures

AbstractAutophagy is a highly conserved process of degradation of cytoplasmic constituents in eukaryotes. It is involved in the growth and development of plants, as well as in biotic and abiotic stress response. Although autophagy-related (ATG) genes have been identified and characterized in many plant species, little is known about this process in Medicago truncatula. In this study, 39 ATGs were identified, and their gene structures and conserved domains were systematically characterized in M. truncatula. Many cis-elements, related to hormone and stress responsiveness, were identified in the promoters of MtATGs. Phylogenetic and interaction network analyses suggested that the function of MtATGs is evolutionarily conserved in Arabidopsis and M. truncatula. The expression of MtATGs, at varied levels, was detected in all examined tissues. In addition, most of the MtATGs were highly induced during seed development and drought stress, which indicates that autophagy plays an important role in seed development and responses to drought stress in M. truncatula. In conclusion, this study gives a comprehensive overview of MtATGs and provides important clues for further functional analysis of autophagy in M. truncatula.

scholarly journals Genome-wide identification and analysis of cystatin family genes in Sorghum (Sorghum bicolor (L.) Moench)

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e10617
Author(s):  
Jie Li ◽  
Xinhao Liu ◽  
Qingmei Wang ◽  
Junyan Sun ◽  
Dexian He
Keyword(s):  
Gene Family ◽  
Seed Development ◽  
Stress Responses ◽  
Abiotic Stresses ◽  
Expression Profiles ◽  
Seed Formation ◽  
Aphid Infestation ◽  
Genome Wide ◽  
A Genome ◽  
Cystatin Family

To set a systematic study of the Sorghum cystatins (SbCys) gene family, a genome-wide analysis of the SbCys family genes was performed by bioinformatics-based methods. In total, 18 SbCys genes were identified in Sorghum, which were distributed unevenly on chromosomes, and two genes were involved in a tandem duplication event. All SbCys genes had similar exon/intron structure and motifs, indicating their high evolutionary conservation. Transcriptome analysis showed that 16 SbCys genes were expressed in different tissues, and most genes displayed higher expression levels in reproductive tissues than in vegetative tissues, indicating that the SbCys genes participated in the regulation of seed formation. Furthermore, the expression profiles of the SbCys genes revealed that seven cystatin family genes were induced during Bipolaris sorghicola infection and only two genes were responsive to aphid infestation. In addition, quantitative real-time polymerase chain reaction (qRT-PCR) confirmed that 17 SbCys genes were induced by one or two abiotic stresses (dehydration, salt, and ABA stresses). The interaction network indicated that SbCys proteins were associated with several biological processes, including seed development and stress responses. Notably, the expression of SbCys4 was up-regulated under biotic and abiotic stresses, suggesting its potential roles in mediating the responses of Sorghum to adverse environmental impact. Our results provide new insights into the structural and functional characteristics of the SbCys gene family, which lay the foundation for better understanding the roles and regulatory mechanism of Sorghum cystatins in seed development and responses to different stress conditions.

scholarly journals Transcriptome Profiling Reveals Spatial-temporal Dynamics of Gene Expression Essential for Soybean Seed Development

2020 ◽  
Author(s):  
Hengyou Zhang ◽  
Zhenbin Hu ◽  
Yuming Yang ◽  
Xiaoqian Liu ◽  
Haiyan Lv ◽  
...  
Keyword(s):  
Seed Development ◽  
Temporal Dynamics ◽  
Expression Patterns ◽  
Soybean Seed ◽  
Transcriptome Profiling ◽  
Transcript Abundance ◽  
Specific Gene ◽  
Oilseed Crop ◽  
Seed Formation ◽  
Developing Seeds

Abstract Background: Seeds are the economic basis of oilseed crops, especially for soybean, thus far the most widely cultivated oilseed crop worldwide. Seed development is accompanied with a multitude of diverse cellular processes and revealing the underlying regulatory activities is critical for seed improvement. Results: Here, we profiled transcriptomes of developing seeds (20, 25, 30, 40 days after flowering) representing key points of seed development from early to full development. We identified a set of highly-abundant genes and highlighted the importance of these genes to support nutrient accumulation and transcriptional regulation in developing seeds. We identified 8,925 differentially expressed genes that exhibited temporal expression patterns over the course and had expression specificities in distinct tissues including seeds and non-seed tissues (roots, stems, leaves). Genes with specificities to non-seed tissues have tissue-specialized roles while remain relatively low transcript abundance in developing seeds, exhibiting their supportive roles spatially for seed development. Co-expression network analysis identified several under-explored genes in soybean that bridge tissue-specific gene modules. Conclusions: Our study provides a global view of gene activities and biological processes critical for seed formation in soybean and prioritizes a set of genes for further study. The results shed insight into the mechanism controlling seed development and storage reserves.

scholarly journals Sucrose Metabolism in Plants under Drought Stress Condition: A Review

2021 ◽  
Author(s):  
Anie Thomas ◽  
R. Beena
Keyword(s):  
Drought Stress ◽  
Developmental Stages ◽  
Sucrose Concentration ◽  
Turgor Pressure ◽  
Biomass Accumulation ◽  
Sucrose Metabolism ◽  
Drought Condition ◽  
Expression Of Genes ◽  
Source To Sink ◽  
Root Shoot Ratio

Drought stress reduces photosynthetic rate and leading to depletion of the energy source and lowers the yield. Under drought stress, reduced turgor pressure cause inhibition of cell elongation and impaired mitosis leads to reduction in growth rate. Role of sucrose metabolism under drought adaptation and response of plants to stress in different tissues and at different developmental stages. Cytoplasmic sucrose synthesis is more under drought condition and there is differential expression in tolerant and susceptible cultivars. Under drought condition, plant start consuming its own sink for its survival thus reducing sucrose concentration. But reduction in sucrose concentration is less in drought tolerant plants. Drought stress induced an increase of the root/shoot ratio, which was due to the increased inhibition of biomass accumulation of shoots compared to roots. Drought stress enhanced the activities of sucrose metabolic enzymes and up-regulated the expression of genes such as SPS, SuSy and INV. In addition, drought stress up-regulated the expression levels of SWEET and SUC and promoted the transport of sucrose from source to sink.

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