Auxin-Induced SaARF4 Downregulates SaACO4 to Inhibit Lateral Root Formation in Sedum alfredii Hance

Lateral root (LR) formation promotes plant resistance, whereas high-level ethylene induced by abiotic stress will inhibit LR emergence. Considering that local auxin accumulation is a precondition for LR generation, auxin-induced genes inhibiting ethylene synthesis may thus be important for LR development. Here, we found that auxin response factor 4 (SaARF4) in Sedum alfredii Hance could be induced by auxin. The overexpression of SaARF4 decreased the LR number and reduced the vessel diameters. Meanwhile, the auxin distribution mode was altered in the root tips and PIN expression was also decreased in the overexpressed lines compared with the wild-type (WT) plants. The overexpression of SaARF4 could reduce ethylene synthesis, and thus, the repression of ethylene production decreased the LR number of WT and reduced PIN expression in the roots. Furthermore, the quantitative real-time PCR, chromatin immunoprecipitation sequencing, yeast one-hybrid, and dual-luciferase assay results showed that SaARF4 could bind the promoter of 1-aminocyclopropane-1-carboxylate oxidase 4 (SaACO4), associated with ethylene biosynthesis, and could downregulate its expression. Therefore, we concluded that SaARF4 induced by auxin can inhibit ethylene biosynthesis by repressing SaACO4 expression, and this process may affect auxin transport to delay LR development.

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Effects of Some Chelators and Surfactants on Hyperaccumulator Sedum alfredii Hance Remediating Contaminated Soil

Soil and Sediment Contamination An International Journal ◽

10.1080/15320383.2019.1661352 ◽

2019 ◽

Vol 28 (8) ◽

pp. 747-756

Author(s):

Xuekai Dou ◽

Huiping Dai ◽

Shuhe Wei ◽

Yahu Hu ◽

Lidia Skuza

Keyword(s):

Contaminated Soil ◽

Sedum Alfredii ◽

Sedum Alfredii Hance

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Effects of Trifluralin on Root Morphology and Mineral Status of Wheat (Triticum aestivum) Seedlings

Weed Science ◽

10.1017/s0043174500059178 ◽

1984 ◽

Vol 32 (3) ◽

pp. 382-387 ◽

Cited By ~ 5

Author(s):

Barry M. Olson ◽

Robert B. McKercher ◽

Edward H. Halstead

Keyword(s):

Triticum Aestivum ◽

Lateral Root ◽

Growth Period ◽

Nutrient Concentrations ◽

Root Production ◽

Root Tips ◽

Wheat Seedlings ◽

Mineral Status ◽

Seminal Roots ◽

Percent Nitrogen

Growth chamber studies using one soil investigated the effects of trifluralin (α,α,α-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine) at 0.0, 0.4, and 0.8 ppmw on the root development and the mineral status of wheat (Triticum aestivumL. ‘Neepawa’) seedlings. The 0.8-ppmw trifluralin rate increased the number of seminal roots, reduced lateral root production, decreased root extension, caused root tips to swell (club-like appearance), and reduced root dry weights. However, 0.4-ppmw trifluralin caused only slight damage to the seedlings. Towards the end of the two-week growth period, damaged seedlings showed signs of recovery, which included an increased number of seminal roots, development of normal root extensions from clubbed root tips, and development of normal lateral root patterns. Trifluralin increased percent calcium and magnesium and decreased percent nitrogen, phosphorus, and potassium in wheat plants. The nutrient concentrations were more affected in 21-day-old plants than in 35-day-old plants, indicating the wheat seedlings were able to recover from trifluralin injury.

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Nicotianamine Synthase Gene 1 from the hyperaccumulator Sedum alfredii Hance is associated with Cd/Zn tolerance and accumulation in plants

Plant and Soil ◽

10.1007/s11104-019-04233-4 ◽

2019 ◽

Vol 443 (1-2) ◽

pp. 413-427 ◽

Cited By ~ 2

Author(s):

Shaoning Chen ◽

Min Zhang ◽

Ying Feng ◽

Zulfiqar Ali Sahito ◽

Shengke Tian ◽

...

Keyword(s):

Sedum Alfredii ◽

Sedum Alfredii Hance ◽

Nicotianamine Synthase ◽

Zn Tolerance

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Effects of CO2 application coupled with endophyte inoculation on rhizosphere characteristics and cadmium uptake by Sedum alfredii Hance in response to cadmium stress

Journal of Environmental Management ◽

10.1016/j.jenvman.2019.03.084 ◽

2019 ◽

Vol 239 ◽

pp. 287-298 ◽

Cited By ~ 3

Author(s):

Lin Tang ◽

Yasir Hamid ◽

Zulfiqar Ali Sahito ◽

Hanumanth Kumar Gurajala ◽

Zhenli He ◽

...

Keyword(s):

Cadmium Stress ◽

Cadmium Uptake ◽

Sedum Alfredii ◽

Sedum Alfredii Hance

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Temperature Effects on Absorption and Translocation of Trifluralin and Methazole in Peanuts

Weed Science ◽

10.1017/s0043174500035669 ◽

1972 ◽

Vol 20 (4) ◽

pp. 285-289 ◽

Cited By ~ 15

Author(s):

K. Hawxby ◽

E. Basler ◽

P. W. Santelmann

Keyword(s):

Temperature Effects ◽

Lateral Root ◽

Initial Rate ◽

Lateral Roots ◽

Leaf Tissue ◽

Root Tips ◽

Plant Parts ◽

Tap Root ◽

Rate Of Absorption ◽

Nutrient Solutions

The absorption and translocation of14C-labeled α,α,α-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine (trifluralin) and 2-(3,4-dichlorophenyl)-4-methyl-1,2,4-oxadiazolidine-3,5-dione methazole from nutrient solutions of various temperatures by(Arachis hypogaeaL. ‘Starr’) seedlings were determined. The accumulation of trifluralin in roots at 24 hr after exposure to trifluralin was greatest at 21 C and decreased at higher temperatures up to 38 C. The amounts of trifluralin translocated and accumulated in hypocotyls, tops, and cotyledons were small but generally increased with temperature. The initial rate of absorption of trifluralin was greater in excised lateral root tips than in tap root tips, but there was a greater accumulation in excised tap roots at 24 hr. The initial rates of absorption were higher for excised lateral roots at high temperatures. Total absorption of trifluralin at equilibrium was not proportional to the initial rates of absorption but was highest at low (21 C) and high (38 C) temperatures for excised lateral roots. The absorption of methazole by roots and translocation to other plant parts increased linearly with temperature, and it tended to accumulate in the mature leaf tissue.

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