scholarly journals Karrikin Signaling Acts Parallel to and Additively with Strigolactone Signaling to Regulate Rice Mesocotyl Elongation in Darkness

2020 ◽  
Vol 32 (9) ◽  
pp. 2780-2805 ◽  
Author(s):  
Jianshu Zheng ◽  
Kai Hong ◽  
Longjun Zeng ◽  
Lei Wang ◽  
Shujing Kang ◽  
...  
Keyword(s):  
Mesocotyl Elongation

Physiological Mechanism Regulating Light-induced Mesocotyl Elongation by Polyamine Oxidase (PAO) in Maize

2016 ◽  
Vol 42 (5) ◽  
pp. 734 ◽  
Author(s):  
Tong-Zhen ZHANG ◽  
Yong-Sheng LI ◽  
Yue LI ◽  
Hai-Mei YAO ◽  
Juan ZHAO ◽  
...  
Keyword(s):  
Physiological Mechanism ◽  
Polyamine Oxidase ◽  
Mesocotyl Elongation

scholarly journals Network Analysis of Different Exogenous Hormones on the Regulation of Deep Sowing Tolerance in Maize Seedlings

2021 ◽  
Vol 12 ◽  
Author(s):  
Fenqi Chen ◽  
Xiangzhuo Ji ◽  
Mingxing Bai ◽  
Zelong Zhuang ◽  
Yunling Peng
Keyword(s):  
Inbred Line ◽  
Expression Profiles ◽  
Lignin Biosynthesis ◽  
Maize Seedlings ◽  
Deep Soil ◽  
Exogenous Hormones ◽  
Mesocotyl Elongation ◽  
Gene Modules ◽  
Transcriptome Expression ◽  
Planting Method

The planting method of deep sowing can make the seeds make full use of water in deep soil, which is considered to be an effective way to respond to drought stress. However, deep sowing will affect the growth and development of maize (Zea mays L.) at seedling stage. To better understand the response of maize to deep sowing stress and the mechanism of exogenous hormones [Gibberellin (GA3), Brassinolide (BR), Strigolactone (SL)] alleviates the damaging effects of deep-sowing stress, the physiological and transcriptome expression profiles of seedlings of deep sowing sensitive inbred line Zi330 and the deep-tolerant inbred line Qi319 were compared under deep sowing stress and the conditions of exogenous hormones alleviates stress. The results showed that mesocotyl elongated significantly after both deep sowing stress and application of exogenous hormones, and its elongation was mainly through elongation and expansion of cell volume. Hormone assays revealed no significant changes in zeatin (ZT) content of the mesocotyl after deep sowing and exogenous hormone application. The endogenous GA3 and auxin (IAA) contents in the mesocotyl of the two inbred lines increased significantly after the addition of exogenous GA3, BR, and SL under deep sowing stress compared to deep sowing stress, while BR and SL decreased significantly. Transcriptome analysis showed that the deep seeding stress was alleviated by GA3, BR, and SLs, the differentially expressed genes (DEGs) mainly included cellulose synthase, expansin and glucanase, oxidase, lignin biosynthesis genes and so on. We also found that protein phosphatase 2C and GA receptor GID1 enhanced the ability of resist deep seeding stress in maize by participating in the abscisic acid (ABA) and the GA signaling pathway, respectively. In addition, we identified two gene modules that were significantly related to mesocotyl elongation, and identified some hub genes that were significantly related to mesocotyl elongation by WGCNA analysis. These genes were mainly involved in transcription regulation, hydrolase activity, protein binding and plasma membrane. Our results from this study may provide theoretical basis for determining the maize deep seeding tolerance and the mechanism by which exogenous hormones regulates deep seeding tolerance.

Microtubules Dynamics Regulates Mesocotyl Elongation in Rice

2014 ◽  
Vol 513-517 ◽  
pp. 4277-4280
Author(s):  
Li Li ◽  
Che Wang ◽  
Qian Liang ◽  
Dian Rong Ma ◽  
Wen Fu Chen
Keyword(s):  
Oryza Sativa ◽  
Early Stage ◽  
Seedling Emergence ◽  
Rice Cultivar ◽  
Weedy Rice ◽  
Mesocotyl Elongation

Mesocotyl elongation in rice is essential for seedling emergence. Our previous screening identified weedy rice accessions (Oryza sativa f. spontanea L.) (WR04-6) with unusual long mesocotyl. In this study, using rice cultivar Akihikari (Oryza sativa, subspecies japonica) as control, we observed that weedy rice accessions display more extensive microtubules (MTs) depolymerization in the early stage of mesocotyl elongation. At the end of mesocotyl elongation, the predominant MTs in weedy rice are transversely oriented, while, Akihikari has oblique MTs arrays.

Adaptive Importance of Mesocotyl and Coleoptile Growth in Rice Under Different Moisture Regimes.

1978 ◽  
Vol 5 (4) ◽  
pp. 511 ◽  
Author(s):  
N Takahashi
Keyword(s):  
Moisture Content ◽  
Adaptive Response ◽  
Optimum Moisture Content ◽  
Ethylene Formation ◽  
Coleoptile Growth ◽  
Moisture Regimes ◽  
Mesocotyl Elongation ◽  
Endogenous Ethylene ◽  
Water Tension ◽  
Submerged Conditions

The lengths of mesocotyls (first internodes) and coleoptiles of rice varied greatly with the moisture content of the seed-bed. The optimum moisture content in most Indica cultivars was much higher for coleoptile than for mesocotyl growth, but not in some Japonica cultivars because the mesocotyl growth was not vigorous and did not vary with water content. Under submerged conditions, coleoptile growth was markedly stimulated, particularly in Japonica cultivars but there was no mesocotyl elongation in either cultivar. The plastic variability in the growth of coleoptile, leaves, mesocotyl and other internodes may be an adaptive response of rice to the water tension of the soil. Endogenous ethylene formation and effects of ethylene and carbon dioxide were also studied.

scholarly journals Genome-wide Association Study (GWAS) of mesocotyl elongation based on re-sequencing approach in rice

2015 ◽  
Vol 15 (1) ◽  
Author(s):  
Jinhong Wu ◽  
Fangjun Feng ◽  
Xingming Lian ◽  
Xiaoying Teng ◽  
Haibin Wei ◽  
...  
Keyword(s):  
Association Study ◽  
Genome Wide Association Study ◽  
Genome Wide Association ◽  
Genome Wide ◽  
Mesocotyl Elongation

scholarly journals Red Light-inhibited Mesocotyl Elongation in Maize Seedlings

1978 ◽  
Vol 61 (4) ◽  
pp. 534-537 ◽  
Author(s):  
Larry N. Vanderhoef ◽  
Winslow R. Briggs
Keyword(s):  
Red Light ◽  
Maize Seedlings ◽  
Mesocotyl Elongation

scholarly journals Strigolactone and Cytokinin Act Antagonistically in Regulating Rice Mesocotyl Elongation in Darkness

2013 ◽  
Vol 55 (1) ◽  
pp. 30-41 ◽  
Author(s):  
Zhongyuan Hu ◽  
Takaki Yamauchi ◽  
Jinghua Yang ◽  
Yusuke Jikumaru ◽  
Tomoko Tsuchida-Mayama ◽  
...  
Keyword(s):  
Mesocotyl Elongation
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