Cold stratification requirements for seed dormancy-break differ in soil moisture content but not duration for alpine and desert species

被引：12

作者：

Chen, Dali ^{[1
]}

Yuan, Zhen ^{[1
]}

Luo, Xinping ^{[1
]}

Yang, Lingjie ^{[1
]}

Chen, Xianglai ^{[1
]}

Zhang, Zuxin ^{[1
]}

Wang, Jingjing ^{[1
]}

Hu, Xiaowen ^{[1
]}

机构：

[1] Lanzhou Univ, State Key Lab Grassland Agroecosyst,Coll Pastoral, Key Lab Grassland Livestock Ind Innovat,Minist Ed, Minist Agr & Rural Affairs,Engn Res Ctr Grassland, Lanzhou 730000, Peoples R China

来源：

PLANT AND SOIL | 2022年 / 471卷 / 1-2期

基金：

国家重点研发计划;

关键词：

Seed dormancy; Cold stratification; Habitats; Soil moisture content; Stratification duration; Climate change; CLIMATE-CHANGE; GERMINATION RESPONSE; PRECHILL DURATION; R PACKAGE; TEMPERATURE; INHIBITION; AUSTRALIA; ALTITUDE; PATTERNS; PREDICT;

D O I：

10.1007/s11104-021-05212-4

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Background and aims Seed dormancy-break via cold stratification is of fundamental importance for plant adaptation to environmental conditions and response to climate change through timing germination, seedling emergence and consequently community dynamics. Although cold stratification requirements for dormancy break vary among species, it is not known if this variation is determined by the environmental conditions experienced by seeds or by differences among species. Methods We determined the soil moisture content and duration of cold stratification required for seed dormancy-break of species from alpine and desert habitats (soil moisture content: 20 and 18 species from alpine and desert habitats, respectively; duration: 16 and 16 species from the alpine and desert, respectively), and examined the correlation between environmental conditions (soil moisture content and duration of cold stratification) required for dormancy-break and seed traits. Results Seed germination increased and then decreased as soil moisture content or duration of cold stratification increased. The optimal and critical soil moisture content for seed dormancy-break were higher for alpine species than desert species. A positive correlation between optimal soil moisture content and seed shape was found. However, the duration of cold stratification required for dormancy-break was not related to habitat, seed mass or seed shape. Conclusions Our results suggest that soil moisture content rather than duration of cold stratification resulting from climate change could affect seed germination and consequently seedling emergence and establishment, especially for desert species.

引用

页码：393 / 407

页数：15

共 78 条

[1] Precipitation controls seed bank size and its role in alpine meadow community regeneration with increasing altitude [J].