USE OF ETHYLENE ACTION INHIBITOR ON PEPPER

2021 ◽  
pp. 386-397
Author(s):  
Fernanda Ferreira de Araujo ◽  
Ana Izabella Freire ◽  
Maria Eduarda Silva Guimarães ◽  
Paula Cristina Carvalho Lima ◽  
Fernando Luiz Finger ◽  
...  
Keyword(s):  
Ethylene Action

scholarly journals N-1-naphthylphthalamic acid stimulates tomato hypocotyl elongation, elevates ethylene levels and alters metabolic homeostasis

2018 ◽  
Author(s):  
Sapana Nongmaithem ◽  
Sameera Devulapalli ◽  
Yellamaraju Sreelakshmi ◽  
Rameshwar Sharma
Keyword(s):  
Butyric Acid ◽  
Metabolic Networks ◽  
Higher Plants ◽  
Red Light ◽  
Hypocotyl Elongation ◽  
Stimulated Emission ◽  
Ethylene Action ◽  
Naphthylphthalamic Acid ◽  
Exogenous Ethylene ◽  
Species Specific

One sentence summaryN-1-naphthylphthalamic acid (NPA) treatment stimulates tomato hypocotyl elongation likely by elevating ethylene emission and lowering indole-3-butyric acid levels in the seedlings.AbstractIn higher plants, phytohormone indole-3-acetic acid is characteristically transported from the apex towards the base of the plant, termed as polar auxin transport (PAT). Among the inhibitors blocking PAT, N-1-naphthylphthalamic acid (NPA) that targets ABCB transporters is most commonly used. NPA-treated light-grown Arabidopsis seedlings show severe inhibition of hypocotyl and root elongation. In light-grown tomato seedlings, NPA inhibited root growth, but contrary to Arabidopsis stimulated hypocotyl elongation. The NPA-stimulation of hypocotyl elongation was milder in blue, red, and far-red light-grown seedlings. The NPA-treatment stimulated emission of ethylene from the seedlings. The scrubbing of ethylene by mercuric perchlorate reduced NPA-stimulated hypocotyl elongation. NPA action on hypocotyl elongation was antagonized by 1-methylcyclopropene, an inhibitor of ethylene action. NPA-treated seedlings had reduced levels of indole-3-butyric acid and higher levels of zeatin in the shoots. NPA did not alter indole-3-acetic levels in shoots. The analysis of metabolic networks indicated that NPA-treatment induced moderate shifts in the networks compared to exogenous ethylene that induced a drastic shift in metabolic networks. Our results indicate that in addition to ethylene, NPA-stimulated hypocotyl elongation in tomato may also involve zeatin and indole-3-butyric acid. Our results indicate that NPA-mediated physiological responses may vary in a species-specific fashion.

scholarly journals Correlation between morphoagronomic traits and resistance to ethylene action in ornamental peppers.

2015 ◽  
Vol 33 (2) ◽  
pp. 151-154 ◽  
Author(s):  
Mayana F Nascimento ◽  
Elizanilda R Rêgo ◽  
Naysa FF Nascimento ◽  
Rusthon MC Santos ◽  
Claudio H Bruckner ◽  
...  
Keyword(s):  
Pearson Correlation ◽  
Production Quality ◽  
Matter Content ◽  
Leaf Abscission ◽  
Fluorescent Light ◽  
Dry Matter Content ◽  
Anther Length ◽  
Ethylene Action ◽  
Ripe Stage ◽  
Pericarp Thickness

The post-production quality of ornamental peppers can be shorted due to exposure to ethylene. The concentration of this phytohormone at 10 µL/L induces leaf, fruit and flowers abscission, ripening of climacteric fruits, organ senescence, seed germination and seedling growth. We evaluated the correlation between pepper morphoagronomic traits and resistance to ethylene on ornamental peppers. Two genotypes, one resistant (UFPB 132), a susceptible (UFPB 134), and two hybrids (DR x PN) were utilized (76 x PN) to assess the susceptibility or resistance to ethylene. The experimental design was completely randomized, with four replications. First, 19 morphoagronomic characteristics were analyzed when the plants had 30% of fruits at the ripe stage. At this stage, the pots were transferred to a room at 25oC with 8-10 µmol/s/m2 of white fluorescent light. Afterwards, the pots were placed in a 60-L container and treated with ethylene at final concentration of 10 µL/L. The plants were exposed to ethylene for 48 hours and then kept at room temperature for further analysis. Afterwards, the number of leaves and fruits was determined at time zero and after 144 hours after end of the ethylene treatment. The Pearson correlation was calculated for each pair of variables and submitted to t-test (p≤0.05). We observed high occurrence of a significant positive correlation (>0.95) between leaf abscission and the anther length, major fruit width, pedicel length, pericarp thickness and dry matter content of the fruits. No significant correlation between fruit abscission and morphological evaluated variables was found. These results show the possibility to use morphological measurements to select plants resistant to leaf abscission induced by ethylene, while for the abscission of fruits, No relation to the morphological parameters evaluated in this experiment was possible to be established.

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