Comparison of transcriptomic adjustments to availability of sugar, cellular energy, and oxygen in germinating rice embryos

Lim, Mi-na; Lee, Sungeun; Chang, Woo Yong; Yoon, In Sun; Hwang, Yong-sic

doi:10.1016/j.jplph.2021.153471

Cited by 4 publications

(5 citation statements)

References 56 publications

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“…In rice seeds, the transcriptomic landscape was overseen during various stages of seed development and germination, including dormancy and vigor. Many genotype-, stage-, and treatment-specific factors were identified along with common players, transversal to other species as well [ 94 , 100 , 109 , 110 , 117 , 118 , 120 ]. In relation to this transversality, recently, more emphasis is being placed on mechanisms involving the dynamics of chromatin remodeling and DNA damage response (DDR), a pathway gathering together important downstream processes like DNA repair, cell cycle regulation, and PCD [ 124 , 125 ].…”

Section: Discussionmentioning

confidence: 99%

“…This is possible because seedlings prioritize the elongation of coleoptile over the development of roots, allowing the coleoptile to reach the aerated water surface and then promote oxygenation of developmental tissues [ 114 , 115 ]. Several recent studies have looked into the transcriptomics overview of rice germination under hypoxia, anoxia, and reoxygenation [ 116 , 117 , 118 , 119 , 120 ]. For instance, a microarray transcriptomics profile was carried out in rice (cv.…”

Section: Transcriptomics Scenario In Relation To Rice Germinationmentioning

confidence: 99%

“…For instance, a microarray transcriptomics profile was carried out in rice (cv. Dongjin) embryos incubated for 24 h under aerobic or anaerobic conditions in the presence/absence of sugar starvation [ 120 ]. Considering the impact of sugar (hence, energy requirements of germinating embryos), the study evidenced that the aerobic/anaerobic conditions have different sugar regulation patterns; namely, anoxia induced more downregulation (434 genes) rather than upregulation (96 genes), while the opposite was observed in the case of aerobic conditions (three-fold higher rates of upregulation).…”

Section: Transcriptomics Scenario In Relation To Rice Germinationmentioning

confidence: 99%

“…In the case of anoxia, the majority of responsive genes were overlapping with low-energy-responsive genes (e.g., α-amylase, hexokinase, ATP dependent phosphofructokinase, pyruvate orthophosphate dikinase, pyruvate decarboxylase, alcohol dehydrogenase). The fact that many of the analyzed genes resulted to be co-responsive under the different conditions implies that the signaling pathways are closely interconnected with each other, and most probably involve ABA [ 120 ]. Similar considerations were drawn from another study where transcriptomics of weedy and cultivated rice grown under hypoxia were compared [ 119 ].…”

Section: Transcriptomics Scenario In Relation To Rice Germinationmentioning

confidence: 99%

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Transcriptomics View over the Germination Landscape in Biofortified Rice

Dueñas

Slamet‐Loedin

Macovei

2021

Genes

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Hidden hunger, or micronutrient deficiency, is a worldwide problem. Several approaches are employed to alleviate its effects (e.g., promoting diet diversity, use of dietary supplements, chemical fortification of processed food), and among these, biofortification is considered as one of the most cost-effective and highly sustainable. Rice is one of the best targets for biofortification since it is a staple food for almost half of the world’s population as a high-energy source but with low nutritional value. Multiple biofortified rice lines have been produced during the past decades, while few studies also reported modifications in germination behavior (in terms of enhanced or decreased germination percentage or speed). It is important to underline that rapid, uniform germination, and seedling establishment are essential prerequisites for crop productivity. Combining the two traits, biofortified, highly-nutritious seeds with improved germination behavior can be envisaged as a highly-desired target for rice breeding. To this purpose, information gathered from transcriptomics studies can reveal useful insights to unveil the molecular players governing both traits. The present review aims to provide an overview of transcriptomics studies applied at the crossroad between biofortification and seed germination, pointing out potential candidates for trait pyramiding.

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Section: Discussionmentioning

confidence: 99%

Section: Transcriptomics Scenario In Relation To Rice Germinationmentioning

confidence: 99%

Section: Transcriptomics Scenario In Relation To Rice Germinationmentioning

confidence: 99%

Section: Transcriptomics Scenario In Relation To Rice Germinationmentioning

confidence: 99%

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Transcriptomics View over the Germination Landscape in Biofortified Rice

Dueñas

Slamet‐Loedin

Macovei

2021

Genes

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“…This is related to the water limit needed to trigger metabolic and physiological mechanisms to commence germination and the oxygen availability in more water levels. To begin, germination requires oxygen availability in sufficient amounts [93,94]. Since there is an inverse link between water and oxygen availability and an ideal balance for germination, seed oxygen availability dropped when water levels were applied over the optimum range.…”

Section: Water Availability Experimentsmentioning

confidence: 99%

Effect of Abiotic Stresses from Drought, Temperature, and Density on Germination and Seedling Growth of Barley (Hordeum vulgare L.)

Tarnawa

Kende

Sghaier

et al. 2023

Plants

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Seed germination and seedling growth are highly sensitive to deficit moisture and temperature stress. This study was designed to investigate barley (Hordeum vulgare L.) seeds’ germination and seedling growth under conditions of abiotic stresses. Constant temperature levels of 5, 10, 15, 20, 25, 30, and 35 °C were used for the germination test. Drought and waterlogging stresses using 30 different water levels were examined using two methods: either based at 1 milliliter intervals or, on the other hand, as percentages of thousand kernel weight (TKW). Seedling density in a petri dish and antifungal application techniques were also investigated. Temperature significantly impacted germination time and seedling development with an ideal range of 15–20 °C, with a more comprehensive range to 10 °C. Higher temperatures reversely affected germination percentage, and the lower ones affected the germination and seedling growth rate. Germination commenced at 130% water of the TKW, and the ideal water range for seedling development was greater and more extensive than the range for germination, which means there is a difference between the starting point for germination and the seedling development. Seed size define germination water requirements and provides an objective and more precise basis suggesting an optimal range supply of 720% and 1080% of TKW for barley seedling development. A total of 10 seeds per 9 cm petri dish may be preferable over greater densities. The techniques of priming seeds with an antifungal solution (Bordóilé or Hypo) or antifungal application at even 5 ppm in the media significantly prevented fungal growth. This study is novel regarding the levels and types of abiotic stresses, the crop, the experimental and measurement techniques, and in comparison to the previous studies.

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