OsGASR9 positively regulates grain size and yield in rice (Oryza sativa)

Copyright © 2019. Published by Elsevier B.V..

The plant-specific gibberellic acid (GA)-stimulated transcript gene family is critical for plant growth and development. There are 10 family members in rice (Oryza sativa), known as OsGASRs. However, few have been functionally characterized. Here, we investigated the function of OsGASR9 in rice. OsGASR9 transcripts were detected in various tissues, with the lowest and highest levels in leaves and panicles, respectively. Greater mRNA levels accumulated in young, compared with in old, panicles and spikelets. OsGASR9 localized to the plasma membrane, cytoplasm and nucleus. Transgenic RNA interference-derived lines in the Zhonghua 11 background exhibited reduced plant height, grain size and yield compared with the wild-type. The two osgasr9 mutants in the Nipponbare background showed similar phenotypes. Conversely, the overexpression of OsGASR9 in the two backgrounds increased plant height and grain size. A significantly increased grain yield per plant was also observed in the overexpression lines having a Nipponbare background. Furthermore, by measuring the GA-induced lengths of the second leaf sheaths and α-amylase activity levels of seeds, we concluded that OsGASR9 is a positive regulator of responses to GA in rice. Thus, OsGASR9 may regulate plant height, grain size and yield through the GA pathway and could have an application value in breeding.

Medienart:

E-Artikel

Erscheinungsjahr:

2019

Erschienen:

2019

Enthalten in:

Zur Gesamtaufnahme - volume:286

Enthalten in:

Plant science : an international journal of experimental plant biology - 286(2019) vom: 12. Sept., Seite 17-27

Sprache:

Englisch

Beteiligte Personen:

Li, Xiangbo [VerfasserIn]
Shi, Shuangyue [VerfasserIn]
Tao, Quandan [VerfasserIn]
Tao, Yajun [VerfasserIn]
Miao, Jun [VerfasserIn]
Peng, Xiuron [VerfasserIn]
Li, Chang [VerfasserIn]
Yang, Zefeng [VerfasserIn]
Zhou, Yong [VerfasserIn]
Liang, Guohua [VerfasserIn]

Links:

Volltext

Themen:

BU0A7MWB6L
Gibberellic acid
Gibberellic acid-stimulated transcript
Gibberellins
Grain size
Grain yield
Journal Article
Plant Growth Regulators
Plant Proteins
Rice

Anmerkungen:

Date Completed 13.08.2019

Date Revised 30.09.2020

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1016/j.plantsci.2019.03.008

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM299132250