Abstract:
:Identifying physiological and transcriptomic changes can provide insights into the effects of drier air humidity stress on plants. In this study, we selected 6-month-old seedlings of Pterocarya stenoptera as study materials and used physiological index detection and transcriptome sequencing to investigate the adaptation mechanism of P. stenoptera in response to drier air humidity stress. Proline content, and superoxide dismutase and peroxidase activities did not increase significantly under drier air humidity stress. The physiological results showed that the drier air humidity stress only had slight effects on P. stenoptera. However, transcriptome sequencing showed that P. stenoptera initiated a series of metabolic pathways including L-phenylalanine catabolic process, NAD biosynthetic process, ATP biosynthetic process, and thiamine metabolism under drier air humidity stress. The enriched Kyoto Encyclopedia of Genes and Genomes results at 2 and 4 weeks under the drier air humidity stress showed that the genes THI1 and THIC in thiamine metabolism exhibited significantly differential expression. Previous studies confirmed that the two genes can improve drought tolerance. Our results implicitly indicated that exogenous thiamine might improve drought tolerance and alleviate the yellowing of the P. stenoptera leaves. Our study provides insights into the adaptation mechanism of P. stenoptera in response to drier air humidity stress and important clues into the cultivation and management of P. stenoptera in northern cities in China.
journal_name
Genomicsjournal_title
Genomicsauthors
Ye XF,Li Y,Liu HL,He YXdoi
10.1016/j.ygeno.2020.09.027subject
Has Abstractpub_date
2020-11-01 00:00:00pages
5005-5011issue
6eissn
0888-7543issn
1089-8646pii
S0888-7543(20)31408-7journal_volume
112pub_type
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