Root Growth and Enzymes Related to the Lignification of Maize Seedlings Exposed to the Allelochemical L‐DOPA

Siqueira-Soares, Rita de Cássia; Soares, Anderson Ricardo; Parizotto, Ângela Valderrama; Ferrarese, Maria de Lourdes Lúcio; Ferrarese-Filho, Osvaldo

doi:10.1155/2013/134237

Cited by 21 publications

(10 citation statements)

References 40 publications

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“…The role of phenylalanine ammonia-lyase (identified on chromosome 4) in seedling growth has been reported as well (de Cássia Siqueira-Soares et al, 2013 ). Alpha-amylase in the aleurone layer hydrolyses the endosperm starch into sugar which provides energy for the proper growth of roots and shoots (Beck and Ziegler, 1989 ).…”

Section: Discussionmentioning

confidence: 89%

QTL Hotspots for Early Vigor and Related Traits under Dry Direct-Seeded System in Rice (Oryza sativa L.)

et al. 2017

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Strong seedling vigor is desirable trait in dry direct-seeded rice (DSR) for enhancing crop establishment and the ability to compete against weeds. A set of 253 BC3F4 lines derived from cross between Swarna and Moroberekan was phenotyped for early vigor (EV) and 8 related traits viz., early uniform emergence (EUE), shoot length (SHL), stem length (SL), shoot fresh weight (SFW), total fresh weight (TFW), shoot dry weight (SDW), total dry weight (TDW), and root dry weight (RDW). Composite interval mapping analysis using genotypic data from 194 SNP markers identified six genomic regions associated with traits on chromosomes 3, 4, 5, and 6 with phenotypic variance ranging from 2.5 to 18.6%. Among them 2 QTL regions; one on chr3 (id3001701-id300833) and the other on chr5 (wd5002636-id5001470) were identified as QTL hotspots A and B respectively and expressed consistently in field as well as glasshouse condition. The majority of QTLs identified for early vigor, and related traits were clustered in the QTL hotspots A (qEV3.1, qEUE3.1, qSHL3.1, qSL3.1, qSFW3.1, qTFW3.1, qRDW3.1) and QTL hotspot B (qEV5.1, qEUE5.1, qSHL5.1, qSL5.1, qSFW5.1, qSDW5.1, qTDW5.1). Ten putative candidate genes viz., 1-alpha-amylase precursor, 2-glutamate decarboxylase, 1-ethylene-insensitive 3, 3-expansin precursor, and 3-phenylalanine ammonia-lyase associated with the target traits were identified in the selected QTL regions. Mutations were identified in the coding region of alpha-amylase precursor and ethylene-insensitive 3 gene between the parents which can be utilized in marker assisted breeding. Trait relationships among the agro-physiological traits were examined to select the best genotypes for the given traits for use in future breeding programs.

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Section: Discussionmentioning

confidence: 89%

QTL Hotspots for Early Vigor and Related Traits under Dry Direct-Seeded System in Rice (Oryza sativa L.)

et al. 2017

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“…According to Liu, Luo, and Zheng (2018), saline stress increased phenylalanine content in leaves, as it is a precursor of lignin, this could increase lignification. For Gohlizadeh and Kohnehrouz (2010), leaves of corn plants under saline stress had higher activity of the enzyme phenylalanine ammonia-lyase (PAL), which may favor lignin biosynthesis from phenylalanine, and according to Siqueira-Soares et al (2013), cell wall lignification occurs concomitantly with higher PAL activity.…”

Section: Discussionmentioning

confidence: 99%

Production of Pearl Millet Irrigated with Different Levels of Brackish Water and Organic Matter

Lira

Andrade

Magalhães

et al. 2020

Communications in Soil Science and Plant Analysis

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The objective is to determine the growth, yield and chemical characteristics of pearl millet irrigated with different levels of brackish water and organic matter in two cultivation cycles. The experimental design was randomized blocks in a 4 × 4 factorial arrangement, composed of 4 levels of brackish irrigation (25, 50, 75 and 100% evapotranspiration), 4 levels of organic matter (0, 15, 30 and 45 t ha −1 ) with 3 repetitions. Along two cultivation cycles, pearl millet crop was analyzed for: plant growth variables, fresh and dry mass production, water-use efficiency, and chemical composition. There was significant interaction between applied water levels and organic matter for lignin in the 2nd cut (P < .05). The number of leaves, number of dead leaves and fresh mass production were influenced by the isolated effect of brackish water levels in cut 1 (P < .05). In turn, fresh mass production, dry mass production, plant height, leaves length, panicle length, fresh mass production, crude protein and ether extract were influenced by the isolated effect of saline water levels in the 2nd cut (P < .05). Growth, biomass production and chemical composition variables in second cut are positively influenced by different brackish irrigation levels under low rainfall conditions.

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“…L-DOPA as an allelochemical largely exudes by legumes to environment, which produces in leaves and seeds of velvet bean and releases by legumes interferes with growth of neighboring plants by causing injury to root growth [36][37]. In maize, L-DOPA inhibits the activities of phenylalanine ammonia-lyase and tyrosine ammonia-lyase causing accumulation of phenylalanine and tyrosine, which contribute to enhance lignin deposition of root cell wall and a reduction of root growth [38]. Moreover, L-DOPA as a non-protein amino acid is a precursor of many alkaloids and involves in plant secondary metabolite synthesis [36].…”

Section: Discussionmentioning

confidence: 99%

Comparative Metabolome Analyses of Chinese Hickory Nut Kernels Highlight The Importance of Allocation Shift and Accumulation on Primary and Secondary Metabolites During In-Situ Germination

Xiao¹,

ong²,

Wang³

et al. 2020

Preprint

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Background: Chinese hickory ( Carya cathayensis ) and pecan ( C. illinoinensis ) are popular nut trees with high economic value in the family Juglandaceae, due to the richness in nutrients and multiple health factors in their nut kernels. However, the considerable in-situ germination of the nut seeds severely impact the quality of the kernels. The fundamental meta bolic mechanism of in-situ germination has been widely reported in major crops but rare in nut crops. Results: We sampled non- and pre-sprouted Chinese hickory nut kernels and performed liquid chromatography-tandem mass spectrometry (LC–MS/MS)-based metabolomic analyses. Comparative metabolomic analyses revealed 35 6 significantly-changed metabolites during in-situ germination. Detailed analysis emphasized the increasing accumulation and dynamic changes in compounds of primary mechanism and energy supply for in-situ germination. The results highlighted the importance of allocation shift and accumulation on four classes of primary metabolites and their derivatives, and two secondary metabolite classes between the transitions of germination initiation and germination and seedling establishment during the process. Metabolites related to carbohydrates and nitrogen metabolism, and few harmful to human health also demonstrated increasing accumulation along the process. Conclusions: The findings flourish our understanding of the metabolic mechanisms of in-situ germination and will be useful for future application in molecular breeding in Chinese hickory.

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Root Growth and Enzymes Related to the Lignification of Maize Seedlings Exposed to the Allelochemical L‐DOPA

Cited by 21 publications

References 40 publications

QTL Hotspots for Early Vigor and Related Traits under Dry Direct-Seeded System in Rice (Oryza sativa L.)

QTL Hotspots for Early Vigor and Related Traits under Dry Direct-Seeded System in Rice (Oryza sativa L.)

Production of Pearl Millet Irrigated with Different Levels of Brackish Water and Organic Matter

Comparative Metabolome Analyses of Chinese Hickory Nut Kernels Highlight The Importance of Allocation Shift and Accumulation on Primary and Secondary Metabolites During In-Situ Germination

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