Graviresponse in higher plants and its regulation in molecular bases: Relevance to growth and development, and auxin polar transport in etiolated pea seedlings

PIN-FORMED (PIN) encodes a key auxin polar transport family that plays a crucial role in the outward transport of auxin and several growth and development processes, including dwarfing trees. We identified a dwarfing pear rootstock ‘OHF51’ (Pyrus communis), which limits the growth vigor of the ‘Xueqing’ (Pyrus bretschneideri × Pyrus pyrifolia) scion, and isolated 14 putative PbPINs from the pear Pyrus bretschneideri. The phylogenic relationships, structure, promoter regions, and expression patterns were analyzed. PbPINs were classified into two main groups based on the protein domain structure and categorized into three major groups using the neighbor-joining algorithm. Promoter analysis demonstrated that PbPINs might be closely related to plant growth and development. Through quantitative real-time PCR (qRT-PCR) analysis, we found that the expression patterns of 14 PbPINs varied upon exposure to different organs in dwarfing and vigorous stocks, ‘OHF51’ and ‘QN101’ (Pyrus betulifolia), indicating that they might play varying roles in different tissues and participated in the regulation of growth vigor. These results provide fundamental insights into the characteristics and evolution of the PINs family, as well as the possible relationship between dwarfing ability and auxin polar transport.

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Auxin polar transport in Arabidopsis under simulated microgravity conditions — Relevance to growth and development

Advances in Space Research ◽

10.1016/s0273-1177(99)00344-0 ◽

1999 ◽

Vol 23 (12) ◽

pp. 2033-2036 ◽

Cited By ~ 9

Author(s):

K. Miyamoto ◽

M. Oka ◽

R. Yamamoto ◽

Y. Masuda ◽

T. Hoson ◽

...

Keyword(s):

Growth And Development ◽

Simulated Microgravity ◽

Polar Transport ◽

Microgravity Conditions ◽

Auxin Polar Transport

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Automorphosis of etiolated pea seedlings in space is simulated by a three-dimensional clinostat and the application of inhibitors of auxin polar transport

Physiologia Plantarum ◽

10.1111/j.1399-3054.2005.00472.x ◽

2005 ◽

Vol 123 (4) ◽

pp. 467-474 ◽

Cited By ~ 25

Author(s):

Kensuke Miyamoto ◽

Tomoki Hoshino ◽

Masamichi Yamashita ◽

Junichi Ueda

Keyword(s):

Three Dimensional ◽

Polar Transport ◽

Pea Seedlings ◽

Auxin Polar Transport

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Plant hormones, plant growth regulators

Orvosi Hetilap ◽

10.1556/oh.2014.29939 ◽

2014 ◽

Vol 155 (26) ◽

pp. 1011-1018 ◽

Cited By ~ 1

Author(s):

György Végvári ◽

Edina Vidéki

Keyword(s):

Nervous System ◽

Growth And Development ◽

Large Scale ◽

Essential Role ◽

Higher Plants ◽

Structure And Function ◽

Wide Sense ◽

Large Scale Integration ◽

Scale Integration ◽

And Function

Plants seem to be rather defenceless, they are unable to do motion, have no nervous system or immune system unlike animals. Besides this, plants do have hormones, though these substances are produced not in glands. In view of their complexity they lagged behind animals, however, plant organisms show large scale integration in their structure and function. In higher plants, such as in animals, the intercellular communication is fulfilled through chemical messengers. These specific compounds in plants are called phytohormones, or in a wide sense, bioregulators. Even a small quantity of these endogenous organic compounds are able to regulate the operation, growth and development of higher plants, and keep the connection between cells, tissues and synergy beween organs. Since they do not have nervous and immume systems, phytohormones play essential role in plants’ life. Orv. Hetil., 2014, 155(26), 1011–1018.

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