Persistence of plant hormone levels in rice shoots grown under microgravity conditions in space: its relationship to maintenance of shoot growth

2017 ◽  
Vol 161 (2) ◽  
pp. 285-293 ◽  
Author(s):  
Kazuyuki Wakabayashi ◽  
Kouichi Soga ◽  
Takayuki Hoson ◽  
Toshihisa Kotake ◽  
Mikiko Kojima ◽  
...  
Keyword(s):  
Shoot Growth ◽  
Plant Hormone ◽  
Hormone Levels ◽  
Microgravity Conditions

scholarly journals Hydrogen sulphide alleviates iron deficiency by promoting iron availability and plant hormone levels in Glycine max seedlings

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Juan Chen ◽  
Ni-Na Zhang ◽  
Qing Pan ◽  
Xue-Yuan Lin ◽  
Zhouping Shangguan ◽  
...  
Keyword(s):  
Glycine Max ◽  
Iron Deficiency ◽  
Hydrogen Sulphide ◽  
Plant Hormone ◽  
Iron Availability ◽  
Hormone Levels

scholarly journals TREE1-EIN3–mediated transcriptional repression inhibits shoot growth in response to ethylene

2020 ◽  
Vol 117 (46) ◽  
pp. 29178-29189
Author(s):  
Likai Wang ◽  
Eun Esther Ko ◽  
Jaclyn Tran ◽  
Hong Qiao
Keyword(s):  
Gene Expression ◽  
Transcriptional Activation ◽  
Transcriptional Repression ◽  
Shoot Growth ◽  
Plant Hormone ◽  
Transcriptional Repressor ◽  
Binding Motif ◽  
Dependent Manner ◽  
Ethylene Response ◽  
Dna Motif

Ethylene is an important plant hormone that regulates plant growth, in which the master transcriptionactivator EIN3 (Ethylene Insensitive 3)-mediated transcriptional activation plays vital roles. However, the EIN3-mediated transcriptional repression in ethylene response is unknown. We report here that a Transcriptional Repressor of EIN3-dependent Ethylene-response 1 (TREE1) interacts with EIN3 to regulate transcriptional repression that leads to an inhibition of shoot growth in response to ethylene. Tissue-specific transcriptome analysis showed that most of the genes are down-regulated by ethylene in shoots, and a DNA binding motif was identified that is important for this transcriptional repression. TREE1 binds to the DNA motif to repress gene expression in an EIN3-dependent manner. Genetic validation demonstrated that repression of TREE1-targeted genes leads to an inhibition of shoot growth. Overall, this work establishes a mechanism by which transcriptional repressor TREE1 interacts with EIN3 to inhibit shoot growth via transcriptional repression in response to ethylene.

scholarly journals Reporting plant hormone levels: a disappearing act

2012 ◽  
Vol 9 (3) ◽  
pp. 219-219 ◽  
Author(s):  
Tal Nawy
Keyword(s):  
Plant Hormone ◽  
Hormone Levels

scholarly journals EFFECTS OF CHLOROCHOLINE AND RELATED COMPOUNDS ON THE GROWH AND OTHER CHARACTERISTICS IN SEVERAL VEGETABLE CROPS

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 643a-643
Author(s):  
Young-Ki Park ◽  
Byung-Hoon Min ◽  
Heawon P. Choi ◽  
Jung-Myung Lee
Keyword(s):  
Sweet Potato ◽  
Shoot Growth ◽  
Plant Hormone ◽  
Stem Elongation ◽  
Seedling Quality ◽  
Vegetable Crops ◽  
Chlorocholine Chloride ◽  
Series Of Experiments ◽  
Related Compounds

A series of experiments were conducted to investigate the effects of chlorocholine and similar compounds such as choline, chlorocholine chloride (CCC or chlormequat) and other compounds on the rooting and seedling quality for transplanting. The growth of shoot and root and the ratio of shoot/root were influenced and consequently the seedling quality was improved by chlorocholine treatment. Mungbean bioassays for plant hormone revealed that rooting was promoted and shoot growth or stem elongation was inhibited by the treatment. Addition of other PGRs such as atonik, vitamins and surfactants to chlorocholine solution significantly promoted the rooting of mungbean cuttings as well as the rooting of cutting of sweet potato, cucumber, and watermelon.

Review lecture - Hormones in healthy and diseased plants

1978 ◽  
Vol 200 (1140) ◽  
pp. 231-243 ◽  
Keyword(s):  
Plant Growth ◽  
Growth And Development ◽  
Plant Hormone ◽  
Plant Growth And Development ◽  
Hormone Metabolism ◽  
Developmental Abnormalities ◽  
Hormone Levels ◽  
And Function ◽  
Endogenous Plant

The hormones known to be responsible for control of many aspects of plant growth and development are first briefly described. The effects of infection of plants by certain biotrophic parasites on hormone metabolism and function are then discussed, together with the associated developmental abnormalities. It is seen that though disease frequently does cause considerable changes in hormone levels, the reasons for these changes have only in very few cases been determined. Attention is drawn to the fact that toxins produced by biotrophic parasites may have hormone-like effects, though structurally unrelated to any known endogenous plant hormone.

Xylem-transported chemical signals and the regulation of plant growth and physiology

1993 ◽  
Vol 341 (1295) ◽  
pp. 41-47 ◽  
Keyword(s):  
Field Data ◽  
Shoot Growth ◽  
Plant Hormone ◽  
Field Experiments ◽  
Leaf Growth ◽  
Physiological State ◽  
Chemical Signals ◽  
Soil Drying ◽  
Rooting Zone ◽  
Sites Of Action

There is now a substantial body of evidence that shoot growth and physiology of plants rooted in drying soil may be regulated by chemical signals moving from the root to the shoot in the xylem stream. Although some evidence suggests that soil drying can reduce the supply of promoters of leaf growth and stomatal opening, there is now compelling evidence for an enhanced flux of inhibitors in the xylem stream of draughted plants. Some of this inhibitory activity is still to be identified but at least in some plants the bulk of activity can be explained by the enhanced concentration of the plant hormone abscisic acid (ABA). A series of field experiments has now shown that ABA, moving as a signal from the roots to the leaves in the transpiration stream, can provide a measure of the access that the plant has to water in the soil in the rooting zone. We show here how this signal may be a variation in the concentration of ABA arriving at the sites of action in the leaf. The response to such a signal apparently varies as a function of the physiological state of the leaf. The basis of such variation in the sensitivity of response is also discussed. One other interpretation of the field data is that leaves respond to the amount of ABA arriving in the leaf, rather than the concentration. We show some evidence for this contention.

scholarly journals Long-range mobile signals mediate seasonal control of shoot growth

2019 ◽  
Vol 116 (22) ◽  
pp. 10852-10857 ◽  
Author(s):  
Pál Miskolczi ◽  
Rajesh Kumar Singh ◽  
Szymon Tylewicz ◽  
Abdul Azeez ◽  
Jay P. Maurya ◽  
...  
Keyword(s):  
Shoot Apex ◽  
Shoot Growth ◽  
Plant Hormone ◽  
Growth Control ◽  
Growth Patterns ◽  
Seasonal Growth ◽  
Flowering Locus T ◽  
Adaptive Growth ◽  
Terminal Flower 1 ◽  
Systemic Signals

In perennial plants, seasonal shifts provide cues that control adaptive growth patterns of the shoot apex. However, where these seasonal cues are sensed and communicated to the shoot apex remains unknown. We demonstrate that systemic signals from leaves play key roles in seasonal control of shoot growth in model tree hybrid aspen. Grafting experiments reveal that the tree ortholog of Arabidopsis flowering time regulator FLOWERING LOCUS T (FT) and the plant hormone gibberellic acid (GA) systemically convey seasonal cues to the shoot apex. GA (unlike FT) also acts locally in shoot apex, downstream of FT in seasonal growth control. At the shoot apex, antagonistic factors—LAP1, a target of FT and the FT antagonist TERMINAL FLOWER 1 (TFL1)—act locally to promote and suppress seasonal growth, respectively. These data reveal seasonal changes perceived in leaves that are communicated to the shoot apex by systemic signals that, in concert with locally acting components, control adaptive growth patterns.

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