Nitric oxide signaling and its crosstalk with other plant growth regulators in plant responses to abiotic stress

AbstractFull-size members of the ABCG (ATP-binding cassette, subfamily G) subfamily of ABC transporters have been found only in plants and fungi. The plant genes encoding full-size ABCGs identified so far appeared to be differentially regulated under various environmental constraints, plant growth regulators, and microbial elicitors, indicating a broad functional role of these proteins in plant responses to abiotic and biotic stress. Nevertheless, the structure and physiological function of full-size ABCGs in many plant species are still unknown. We have recently identified 16 genes encoding full-size ABCG proteins in cucumber and found that the transcripts of two of them, CsABCG36 (CsPDR8) and CsABCG40 (CsPDR12), are most abundant in roots and are significantly affected by phytohormones and auxin herbicide. In this study, we analyzed the structure and phylogeny of all the full-size cucumber ABCG transporters and studied the organ expression profiles of the remaining 14 CsABCG genes. In addition, we investigated the effect of different plant growth regulators and the diterpene sclareolide on CsABCG expression in cucumber roots. Until now, the full-size plant ABCG transporters have been grouped into five different clusters. The new phylogenetic analysis of full-size ABCGs from model plants and cucumber clustered these proteins into six different subgroups. Interestingly, the expression profiles of cucumber ABCG genes assigned to the same clusters were not correlated, suggesting functional diversification or different regulatory mechanisms of the full-size cucumber ABCG proteins.

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Alleviation of Abiotic Stress by Nonconventional Plant Growth Regulators in Plant Physiology

New Frontiers in Stress Management for Durable Agriculture ◽

10.1007/978-981-15-1322-0_12 ◽

2020 ◽

pp. 197-211

Author(s):

M. K. Adak ◽

Bipul Sarkar ◽

Arnab Kumar De ◽

Indraneel Saha ◽

Arijit Ghosh

Keyword(s):

Plant Physiology ◽

Abiotic Stress ◽

Plant Growth ◽

Plant Growth Regulators ◽

Growth Regulators

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Paclobutrazol, Uniconazole, or Flurprimidol Applied at Various Concentrations as a Substrate Drench or Through Subirrigation Have Little Effect on Bee Balm Growth

HortTechnology ◽

10.21273/horttech.24.3.313 ◽

2014 ◽

Vol 24 (3) ◽

pp. 313-317

Author(s):

Rachael E. Pepin ◽

Janet C. Cole

Keyword(s):

Plant Growth ◽

Plant Growth Regulators ◽

Growth Regulators ◽

Growth Regulator ◽

Plant Growth Regulator ◽

Plant Size ◽

Plant Responses ◽

Production Environments ◽

Monarda Didyma

Summer and fall studies investigated the control of growth of bee balm (Monarda didyma ‘Marshall’s Delight’) by paclobutrazol, uniconazole, or flurprimidol applied to the substrate as a surface drench or through subirrigation. Flurprimidol and uniconazole were applied at 0, 0.5, 1.0, 1.5, or 2.0 ppm (0, 0.09, 0.18, 0.27, or 2.0 mg/pot), while paclobutrazol was applied at 0, 2, 4, 6, or 8 ppm (0, 0.6, 1.2, 1.8, or 2.4 mg/pot). Substrate drench applications were more effective than applications through subirrigation at reducing plant growth. Few trends in application concentrations within plant growth regulator occurred for the plant parameters measured. Based on inconsistent plant responses between the two studies and few differences among application concentrations, we do not recommend any of these plant growth regulators for controlling plant size of bee balm during production without further testing in production environments specific to bee balm.

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Abscisin II and , some. Hormone-Regulated Plant Responses

Australian Journal of Biological Sciences ◽

10.1071/bi9670869 ◽

1967 ◽

Vol 20 (5) ◽

pp. 869 ◽

Cited By ~ 63

Author(s):

D Aspinall ◽

LG Paleg ◽

FT Addicott

Keyword(s):

Plant Growth ◽

Plant Growth Regulators ◽

Seedling Growth ◽

Growth Regulators ◽

The Other ◽

Plant Responses ◽

Acid Gas ◽

Radicle Elongation ◽

Other Hand

The aotivity of (�)-absoisin II' [(�)AbII] and its interaction with a number of plant growth regulators in the oontrol of lettuce germination, lettuoe hypoootyl and radiole elongation, ououmber seedling growth, radish lea ( senesoenoe, and barley vernalization were examined. The interac.tions between (� )AbII and th�;l promoting h~rmones were of two general types. In gibberellio acid (GAs)-promoted lettuoe germination and kinetin-oontrolled leaf senesoenoe, the effeots of low ooncentrations of ( � )-!\bII were oompletely overoome by high oonoentratioileof the other substanoe. In .the second type of interaction, (� )AbII was inhibitory only in the presenoe of high oonoentrations of the promoter (kinetin in lettuce germinatipn and allogibberio acid in lettuoe radicle elongation). Cuoumber radiole elongation, on the other hand, was promoted by (� )AbII in the presenoe of a mixture of GA4 and GA7.

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