The involvement of cytokinin and nitrogen metabolism in delayed flag leaf senescence in a wheat stay-green mutant, tasg1

Wang, Wenqiang; Hao, Qunqun; Wang, Wenlong; Li, Qinxue; Chen, Fengjuan; Ni, Fei; Wang, Yong; Fu, Daolin; Wu, Jiajie; Wang, Wei

doi:10.1016/j.plantsci.2018.10.024

Cited by 46 publications

(30 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The important role of tZ and less active cZ in the suppression of senescence was proven in maize leaves [69] and in an oat-leaf assay [37]. It was also documented that delayed senescence of wheat stay-green mutant, tasg1, at the late filling stage was related to high cytokinin and nitrogen contents [70].…”

Section: Coordinated Effect Of Tackx Gene Expression On the Content Omentioning

confidence: 96%

Silencing of TaCKX1 Mediates Expression of Other TaCKX Genes to Increase Yield Parameters in Wheat

Jabłoński

Ogonowska

Szala

et al. 2020

IJMS

View full text Add to dashboard Cite

TaCKX, Triticum aestivum (cytokinin oxidase/dehydrogenase) family genes influence the development of wheat plants by the specific regulation of cytokinin content in different organs. However, their detailed role is not known. The TaCKX1, highly and specifically expressed in developing spikes and in seedling roots, was silenced by RNAi-mediated gene silencing via Agrobacterium tumefaciens and the effect of silencing was investigated in 7 DAP (days after pollination) spikes of T1 and T2 generations. Various levels of TaCKX1 silencing in both generations influence different models of co-expression with other TaCKX genes and parameters of yield-related traits. Only a high level of silencing in T2 resulted in strong down-regulation of TaCKX11 (3), up-regulation of TaCKX2.1, 2.2, 5, and 9 (10), and a high yielding phenotype. This phenotype is characterized by a higher spike number, grain number, and grain yield, but lower thousand grain weight (TGW). The content of most of cytokinin forms in 7 DAP spikes of silenced T2 lines increased from 23% to 76% compared to the non-silenced control. The CKs cross talk with other phytohormones. Each of the tested yield-related traits is regulated by various up- or down-regulated TaCKX genes and phytohormones. The coordinated effect of TaCKX1 silencing on the expression of other TaCKX genes, phytohormone levels in 7 DAP spikes, and yield-related traits in silenced T2 lines is presented.

show abstract

Section: Coordinated Effect Of Tackx Gene Expression On the Content Omentioning

confidence: 96%

Silencing of TaCKX1 Mediates Expression of Other TaCKX Genes to Increase Yield Parameters in Wheat

Jabłoński

Ogonowska

Szala

et al. 2020

IJMS

View full text Add to dashboard Cite

show abstract

“…(2019) stated that a more intensive plant density results in a decreasing number of kernels per row, a lower number of grains per ear, a lower grain weight per ear, and a lower 1,000‐grain weight, meaning that the grain proportion is reduced. Therefore, increasing plant density changes the ratio of vegetative organs to grains, thus reducing the forage quality (Kong, 2008; Li, 2018; Yu et al., 2018). Another reason is that a high plant population could decrease the leaf chlorophyll content (Table 2), reduce the enzymatic activity of photosynthesis and assimilation, and accelerate plant aging (Han et al., 2016; Yan et al., 2017; Yin et al., 2019; Wang et al., 2019).…”

Section: Discussionmentioning

confidence: 99%

“…As plant density increases, anabatic inter‐plant competition decreases photosynthetic production assimilation, as well as energy and nutrients accumulation, which causes an increase in the weight of the vegetative organ (leaves and stem), but reduced grain proportion (Li, 2018; Sun, 2017). In turn, this leads to an increased CFi, ash, ADF, and NDF content, and reduces CP, CFa, and NFE content, thus reducing the WMP forage quality (Qiao et al., 2018; Yu, Chen, Bi, & Shao, 2018).…”

Section: Introductionmentioning

confidence: 99%

The optimal plant density of maize for dairy cow forage production

Han

Liu

et al. 2020

Agronomy Journal

View full text Add to dashboard Cite

Whole maize (Zea mays L.) plant (WMP) silage is an important feed for dairy cows. In northern China, yields and feed quality are adjusted by modifying the planting density. This paper is the result of a 2-yr field study aimed at determining the effects of plant density on maize silage yield and quality. Five planting densities (52,500, 60,000, 67,500, 75,000, and 82,500 plants ha −1 ) were used. The results showed that plant height and leaf area increased, while stem diameter, chlorophyll, and leaf area per plant decreased with increasing plant density. Both the biomass yield, expressed as the dry matter (DM) per ha, and the utilizable energy yield improved when the density was increased from 67,500 to 75,000 plants ha −1 , but increasing the density further reduced these values. The highest observed DM were 17,734 kg ha −1 and 17,055 kg ha −1 , and total net energy for lactation (NE L ) were 104.1 GJ ha −1 and 97.0 GJ ha −1 in 2017 and 2018, respectively. Feeding quality generally decreased with increasing plant density. The plant density which obtained the highest biomass yield was not the same as the plant density for optimizing feeding production. Compared with the highest predicted DM yields, the highest predicted total NE L yields increased the grading index by 4-9%, which indicated an improvement in forage quality. Total NE L yield is more efficient for the purpose of evaluating the productivity of WMP forage than biomass yield.

show abstract

“…The important role of tZ and less active cZ in suppression of senescence was proved in maize leaves (Behr et al, 2012), and in an oat-leaf assay (Gajdosova et al, 2011). It was also documented that delayed senescence of wheat stay-green mutant, tasg1, at the late filling stage was related to high cytokinin and nitrogen contents (Wang et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

Silencing ofTaCKX1mediates expression of otherTaCKXgenes to increase grain yield in wheat

Jabłoński

Ogonowska

Szala

et al. 2020

Preprint

View full text Add to dashboard Cite

TaCKX family genes influence development of wheat plants by specific regulation of cytokinin content in different organs. However, their detailed role is not known. The TaCKX1, highly and specifically expressed in developing spikes and in seedling roots, was silenced by RNAi-mediated gene silencing via Agrobacterium and the effect of silencing was investigated in 7 DAP spikes of T1 and T2 generations. Various levels of TaCKX1 silencing in both generations influence different models of co-expression with other TaCKX genes and parameters of yield-related traits. Only a high level of silencing in T2 resulted in strong down-regulation of TaCKX11 (3), up-regulation of TaCKX2.1, 2.2, 5 and 9 (10), and a high yielding phenotype. This phenotype is characterised by higher spike number, grain number and grain yield, as well as slightly higher mass of seedling roots, but lower thousand grain weight (TGW) and slightly lower spike length. Content of most of cytokinin forms in 7 DAP spikes of silenced T2 lines increased from 40 to 76% compared to the non-silenced control. The CKs cross talk with other phytohormones.Each of the tested yield-related traits is regulated by various up- or down-regulated TaCKX genes and phytohormones. Unexpectedly, increased expression of TaCKX2.1 in silent for TaCKX1 T2 plants up-regulated trans- and cis-zeatin and trans-zeatin glucosides, determining lower TGW and chlorophyll content in flag leaves but higher grain yield. The coordinated effect of TaCKX1 silencing on expression of other TaCKX genes, phytohormone levels in 7 DAP spikes and yield-related traits in silenced T2 lines is presented.One-sentence summaryDifferent levels of TaCKX1 silencing influence various models of coordinated expression of TaCKX genes and phytohormone levels in 7 DAP spikes, as well as yield parameters.

show abstract

The involvement of cytokinin and nitrogen metabolism in delayed flag leaf senescence in a wheat stay-green mutant, tasg1

Cited by 46 publications

References 31 publications

Silencing of TaCKX1 Mediates Expression of Other TaCKX Genes to Increase Yield Parameters in Wheat

Silencing of TaCKX1 Mediates Expression of Other TaCKX Genes to Increase Yield Parameters in Wheat

The optimal plant density of maize for dairy cow forage production

Silencing ofTaCKX1mediates expression of otherTaCKXgenes to increase grain yield in wheat

Contact Info

Product

Resources

About