Exogenous IAA improves the seedling growth of Syringa villosa via regulating the endogenous hormones and enhancing the photosynthesis

Jin, Mengran; Shi, Baosheng; Yuan, Hang

doi:10.1016/j.scienta.2022.111585

Cited by 24 publications

(6 citation statements)

References 47 publications

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“…The present study showed that NaCl stress decreased the GA3, JA, IAA, SA, and ZR content and increased the ABA content in rice roots ( Table 2 ). This is similar to a previous study, which found that NaCl stress decreased the GA3 and IAA content and increased the ABA content in maize roots, leading to a decrease in the ratio of type hormones to inhibitory type hormones ( Jin et al, 2023 ). Under salt and non-salt stress, both 5-ALA and DTA-6 increased the GA3, JA, IAA, SA, and ZR content and decreased the ABA content in the root system.…”

Section: Discussionsupporting

confidence: 92%

Plant growth regulators mitigate oxidative damage to rice seedling roots by NaCl stress

Wang,

Zhao,

Feng

et al. 2024

PeerJ

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The aim of this experiment was to investigate the effects of exogenous sprays of 5-aminolevulinic acid (5-ALA) and 2-Diethylaminoethyl hexanoate (DTA-6) on the growth and salt tolerance of rice (Oryza sativa L.) seedlings. This study was conducted in a solar greenhouse at Guangdong Ocean University, where ‘Huanghuazhan’ was selected as the test material, and 40 mg/L 5-ALA and 30 mg/L DTA-6 were applied as foliar sprays at the three-leaf-one-heart stage of rice, followed by treatment with 0.3% NaCl (W/W) 24 h later. A total of six treatments were set up as follows: (1) CK: control, (2) A: 40 mg⋅ L−1 5-ALA, (3) D: 30 mg⋅ L−1 DTA-6, (4) S: 0.3% NaCl, (5) AS: 40 mg⋅ L−1 5-ALA + 0.3% NaCl, and (6) DS: 30 mg⋅ L−1 DTA-6+0.3% NaCl. Samples were taken at 1, 4, 7, 10, and 13 d after NaCl treatment to determine the morphology and physiological and biochemical indices of rice roots. The results showed that NaCl stress significantly inhibited rice growth; disrupted the antioxidant system; increased the rates of malondialdehyde, hydrogen peroxide, and superoxide anion production; and affected the content of related hormones. Malondialdehyde content, hydrogen peroxide content, and superoxide anion production rate significantly increased from 12.57% to 21.82%, 18.12% to 63.10%, and 7.17% to 56.20%, respectively, in the S treatment group compared to the CK group. Under salt stress, foliar sprays of both 5-ALA and DTA-6 increased antioxidant enzyme activities and osmoregulatory substance content; expanded non-enzymatic antioxidant AsA and GSH content; reduced reactive oxygen species (ROS) accumulation; lowered malondialdehyde content; increased endogenous hormones GA3, JA, IAA, SA, and ZR content; and lowered ABA content in the rice root system. The MDA, H2O2, and O2− contents were reduced from 35.64% to 56.92%, 22.30% to 53.47%, and 7.06% to 20.01%, respectively, in the AS treatment group compared with the S treatment group. In the DS treatment group, the MDA, H2O2, and O2− contents were reduced from 24.60% to 51.09%, 12.14% to 59.05%, and 12.70% to 45.20%. In summary, NaCl stress exerted an inhibitory effect on the rice root system, both foliar sprays of 5-ALA and DTA-6 alleviated damage from NaCl stress on the rice root system, and the effect of 5-ALA was better than that of DTA-6.

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Section: Discussionsupporting

confidence: 92%

Plant growth regulators mitigate oxidative damage to rice seedling roots by NaCl stress

Wang,

Zhao,

Feng

et al. 2024

PeerJ

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“…The main consequence of these differences was that high IAA concentrations promoted photosynthesis and nucleotide synthesis, whereas dichloroquinolinic acid had the opposite effect on these processes (Figure 5c,f). Earlier research showed that an exogenous auxin application can significantly increase photosynthetic activities [35], suggesting that even though dichloroquinolinic acid is a hormone-type herbicide, the mechanism underlying its toxicity to tobacco differs from that of high IAA concentrations. Although high concentrations of dichloroquinolinic acid and IAA have detrimental effects on plant cell wall formation, their effects on photosynthesis differ.…”

Section: Discussionmentioning

confidence: 99%

Transcriptomic Change in the Effects of Dichloroquinolinic Acid on the Development and Growth of Nicotiana tabacum

Li,

Ding,

Wang

et al. 2024

Agronomy

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Dichloroquinolinic acid is a hormone-type herbicide widely used to control barnyard grass during crop cultivation. However, it can seriously inhibit the growth of susceptible crops, including tobacco, because it degrades slowly under field conditions. Additionally, the mechanism by which it damages crops is unclear. More specifically, the transcriptional changes in plants induced by dichloroquinolinic acid remain unknown. In this study, differentially expressed genes (DEGs) in tobacco treated with dichloroquinolinic acid (varying concentrations and durations) were analyzed and validated to explore the global transcriptome changes. The number of DEGs, which were determined according to the FPKM, varied from 758 to 21,340. The KEGG analysis revealed that many DEGs were involved in starch and sucrose metabolism, phenylpropanoid biosynthesis, photosynthesis, porphyrin and chlorophyll metabolism, and glutathione metabolism. Transcriptomic analyses indicated that dichloroquinolinic acid can inhibit tobacco growth by inhibiting photosynthesis and storage of energy. We discovered that the toxicity mechanism of the hormone herbicide dichloroquinolinic acid differs from that of high concentrations of IAA (Indoleacetic acid), despite studies confirming that the effects of hormone herbicides are consistent with the physiological disturbances and growth inhibition exhibited by plants in IAA overdose. Particularly, dichloroquinolinic acid suppresses photosynthesis while high concentration IAA stimulates nucleotide synthesis and photosynthesis. More importantly, we found by editing the IAA-responsive gene IAA16, tobacco could develop resistance to dichloroquinolinic acid. The results will help clarify plant responses to hormone-type herbicides at the transcriptional level, thereby providing insights into the diversity in the gene’s response to herbicides, the molecular targets of hormone-type herbicides, and the mechanism underlying the susceptibility of tobacco to dichloroquinolinic acid. Accordingly, this study may be helpful for future research to enhance crop resistance to herbicides residues.

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“…Our previous studies have shown that these microorganisms have high production of indole acetic acid (IAA) and phosphorus solubility. IAA regulates plant growth, and studies have shown that microorganisms that produce IAA and have phosphorus solubility can increase plant biomass and heavy metal accumulation [ 30 , 31 , 32 ]. The symbiotic relationship between AMF and host plants increased the utilization efficiency of soil nutrients by host plants.…”

Section: Discussionmentioning

confidence: 99%

Microorganisms and Biochar Improve the Remediation Efficiency of Paspalum vaginatum and Pennisetum alopecuroides on Cadmium-Contaminated Soil

Liang

Chang

Xie

et al. 2023

Toxics

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Phytoremediation can help remediate potential toxic elements (PTE) in soil. Microorganisms and soil amendments are effective means to improve the efficiency of phytoremediation. This study selected three microorganisms that may promote phytoremediation, including bacteria (Ceratobasidium), fungi (Pseudomonas mendocina), and arbuscular-mycorrhizal fungi (AMF, Funneliformis caledonium). The effects of single or mixed inoculation of three microorganisms on the phytoremediation efficiency of Paspalum vaginatum and Pennisetum alopecuroides were tested under three different degrees of cadmium-contaminated soil (low 10 mg/kg, medium 50 mg/kg, and high 100 mg/kg). The results showed that single inoculation of AMF or Pseudomonas mendocina could significantly increase the biomass of two plants under three different degrees of cadmium-contaminated soil, and the growth-promoting effect of AMF was better than Pseudomonas mendocina. However, simultaneous inoculation of these two microorganisms did not show a better effect than the inoculation of one. Inoculation of Ceratobasidium reduced the biomass of the two plants under high concentrations of cadmium-contaminated soil. Among all treatments, the remediation ability of the two plants was the strongest when inoculated with AMF alone. On this basis, this study explored the effect of AMF combined with corn-straw-biochar on the phytoremediation efficiency of Paspalum vaginatum and Pennisetum alopecuroides. The results showed that biochar could affect plant biomass and Cd concentration in plants by reducing Cd concentration in soil. The combined use of biochar and AMF increased the biomass of Paspalum vaginatum by 8.9–48.6% and the biomass of Pennisetum alopecuroides by 8.04–32.92%. Compared with the single use of AMF or biochar, the combination of the two is better, which greatly improves the efficiency of phytoremediation.

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Exogenous IAA improves the seedling growth of Syringa villosa via regulating the endogenous hormones and enhancing the photosynthesis

Cited by 24 publications

References 47 publications

Plant growth regulators mitigate oxidative damage to rice seedling roots by NaCl stress

Plant growth regulators mitigate oxidative damage to rice seedling roots by NaCl stress

Transcriptomic Change in the Effects of Dichloroquinolinic Acid on the Development and Growth of Nicotiana tabacum

Microorganisms and Biochar Improve the Remediation Efficiency of Paspalum vaginatum and Pennisetum alopecuroides on Cadmium-Contaminated Soil

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