{"title":"晚播胁迫影响小麦基因型的花后干物质和养分分配及其再移动","authors":"R. Rustum Zhiipao, Vijay Pooniya, Dinesh Kumar, Niraj Biswakarma, Naresh K. Bainsla, Nilutpal Saikia, Hriipulou Duo, Lham Dorjee, Prabhu Govindasamy, Kamlesh Kumar Lakhena, Ram Dhan Jat","doi":"10.1111/jac.12693","DOIUrl":null,"url":null,"abstract":"<p>Timely sowing of wheat (<i>Triticum aestivum</i> L.) is a crucial agronomic measure to realize its genetic yield potential, particularly under ever-changing climatic conditions. The present study appraised the genotypic variations of wheat genotypes for dry matter and nutrients' accumulation, partitioning, remobilization and stress indices under timely and late sown conditions of irrigated semi-arid ecology. Five potential wheat genotypes viz. HD-2967, HD-3086, HD-3249, DBW-187 and HD-3226 were evaluated under field conditions, however, the studies for root-system traits were made in PVC tubes. Timely sown wheat had grain yield advantage of 18%, and genotypes DBW-187 (5.77 t ha<sup>−1</sup>) and HD-2967 (4.78 t ha<sup>−1</sup>) produced the highest grain yield under the timely and late sown conditions respectively. The days (d) to anthesis and grain filling period under the late sown was hastened by 5.2 d, and shortened by 7.4 d. Timely sowing enhanced the post-anthesis dry matter accumulation and remobilization to the tune of 18.8% and 23% respectively. Nitrogen, phosphorus and potassium accumulated post-anthesis and their remobilization under the timely sown was significantly greater than the late sown, while the contribution of remobilization to grain content was higher under the late sown except for the nitrogen. The canopy temperature was cooler by 2°C under the timely sown, while the canopy temperature depression was greater by 0.8–1.04°C, at anthesis and dough stages of the crop. The leaf chlorophyll content (SPAD meter value) at anthesis and dough stages improved by 10% and 7.6% due to timely sowing. The genotypes HD-2967 and HD-3249 had relatively greater geometric mean productivity and stress tolerance index coupled with a comparatively higher yield stability index. Further, the root-system traits, that is, total root length (TRL), root biomass and root length density (RLD) were significantly superior both at 50 DAS (days after sowing) and at anthesis under the timely sown compared to the late sown. This study clearly outlined that timely sowing of wheat resulted in higher post-anthesis dry matter accumulation, nutrient acquisition and remobilization along with improved root-system traits and grain yield. Screening of the genotypes, based on stress indices would result in a better understanding of the genotypic performance and improve the genetic yield potential under varying environmental conditions.</p>","PeriodicalId":14864,"journal":{"name":"Journal of Agronomy and Crop Science","volume":"210 2","pages":""},"PeriodicalIF":3.7000,"publicationDate":"2024-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Late-sown stress afflict post-anthesis dry matter and nutrient partitioning and their remobilization in aestivum wheat genotypes\",\"authors\":\"R. Rustum Zhiipao, Vijay Pooniya, Dinesh Kumar, Niraj Biswakarma, Naresh K. Bainsla, Nilutpal Saikia, Hriipulou Duo, Lham Dorjee, Prabhu Govindasamy, Kamlesh Kumar Lakhena, Ram Dhan Jat\",\"doi\":\"10.1111/jac.12693\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Timely sowing of wheat (<i>Triticum aestivum</i> L.) is a crucial agronomic measure to realize its genetic yield potential, particularly under ever-changing climatic conditions. The present study appraised the genotypic variations of wheat genotypes for dry matter and nutrients' accumulation, partitioning, remobilization and stress indices under timely and late sown conditions of irrigated semi-arid ecology. Five potential wheat genotypes viz. HD-2967, HD-3086, HD-3249, DBW-187 and HD-3226 were evaluated under field conditions, however, the studies for root-system traits were made in PVC tubes. Timely sown wheat had grain yield advantage of 18%, and genotypes DBW-187 (5.77 t ha<sup>−1</sup>) and HD-2967 (4.78 t ha<sup>−1</sup>) produced the highest grain yield under the timely and late sown conditions respectively. The days (d) to anthesis and grain filling period under the late sown was hastened by 5.2 d, and shortened by 7.4 d. Timely sowing enhanced the post-anthesis dry matter accumulation and remobilization to the tune of 18.8% and 23% respectively. Nitrogen, phosphorus and potassium accumulated post-anthesis and their remobilization under the timely sown was significantly greater than the late sown, while the contribution of remobilization to grain content was higher under the late sown except for the nitrogen. The canopy temperature was cooler by 2°C under the timely sown, while the canopy temperature depression was greater by 0.8–1.04°C, at anthesis and dough stages of the crop. The leaf chlorophyll content (SPAD meter value) at anthesis and dough stages improved by 10% and 7.6% due to timely sowing. The genotypes HD-2967 and HD-3249 had relatively greater geometric mean productivity and stress tolerance index coupled with a comparatively higher yield stability index. Further, the root-system traits, that is, total root length (TRL), root biomass and root length density (RLD) were significantly superior both at 50 DAS (days after sowing) and at anthesis under the timely sown compared to the late sown. This study clearly outlined that timely sowing of wheat resulted in higher post-anthesis dry matter accumulation, nutrient acquisition and remobilization along with improved root-system traits and grain yield. Screening of the genotypes, based on stress indices would result in a better understanding of the genotypic performance and improve the genetic yield potential under varying environmental conditions.</p>\",\"PeriodicalId\":14864,\"journal\":{\"name\":\"Journal of Agronomy and Crop Science\",\"volume\":\"210 2\",\"pages\":\"\"},\"PeriodicalIF\":3.7000,\"publicationDate\":\"2024-03-28\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Agronomy and Crop Science\",\"FirstCategoryId\":\"97\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1111/jac.12693\",\"RegionNum\":2,\"RegionCategory\":\"农林科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"AGRONOMY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Agronomy and Crop Science","FirstCategoryId":"97","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1111/jac.12693","RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"AGRONOMY","Score":null,"Total":0}
Late-sown stress afflict post-anthesis dry matter and nutrient partitioning and their remobilization in aestivum wheat genotypes
Timely sowing of wheat (Triticum aestivum L.) is a crucial agronomic measure to realize its genetic yield potential, particularly under ever-changing climatic conditions. The present study appraised the genotypic variations of wheat genotypes for dry matter and nutrients' accumulation, partitioning, remobilization and stress indices under timely and late sown conditions of irrigated semi-arid ecology. Five potential wheat genotypes viz. HD-2967, HD-3086, HD-3249, DBW-187 and HD-3226 were evaluated under field conditions, however, the studies for root-system traits were made in PVC tubes. Timely sown wheat had grain yield advantage of 18%, and genotypes DBW-187 (5.77 t ha−1) and HD-2967 (4.78 t ha−1) produced the highest grain yield under the timely and late sown conditions respectively. The days (d) to anthesis and grain filling period under the late sown was hastened by 5.2 d, and shortened by 7.4 d. Timely sowing enhanced the post-anthesis dry matter accumulation and remobilization to the tune of 18.8% and 23% respectively. Nitrogen, phosphorus and potassium accumulated post-anthesis and their remobilization under the timely sown was significantly greater than the late sown, while the contribution of remobilization to grain content was higher under the late sown except for the nitrogen. The canopy temperature was cooler by 2°C under the timely sown, while the canopy temperature depression was greater by 0.8–1.04°C, at anthesis and dough stages of the crop. The leaf chlorophyll content (SPAD meter value) at anthesis and dough stages improved by 10% and 7.6% due to timely sowing. The genotypes HD-2967 and HD-3249 had relatively greater geometric mean productivity and stress tolerance index coupled with a comparatively higher yield stability index. Further, the root-system traits, that is, total root length (TRL), root biomass and root length density (RLD) were significantly superior both at 50 DAS (days after sowing) and at anthesis under the timely sown compared to the late sown. This study clearly outlined that timely sowing of wheat resulted in higher post-anthesis dry matter accumulation, nutrient acquisition and remobilization along with improved root-system traits and grain yield. Screening of the genotypes, based on stress indices would result in a better understanding of the genotypic performance and improve the genetic yield potential under varying environmental conditions.
期刊介绍:
The effects of stress on crop production of agricultural cultivated plants will grow to paramount importance in the 21st century, and the Journal of Agronomy and Crop Science aims to assist in understanding these challenges. In this context, stress refers to extreme conditions under which crops and forages grow. The journal publishes original papers and reviews on the general and special science of abiotic plant stress. Specific topics include: drought, including water-use efficiency, such as salinity, alkaline and acidic stress, extreme temperatures since heat, cold and chilling stress limit the cultivation of crops, flooding and oxidative stress, and means of restricting them. Special attention is on research which have the topic of narrowing the yield gap. The Journal will give preference to field research and studies on plant stress highlighting these subsections. Particular regard is given to application-oriented basic research and applied research. The application of the scientific principles of agricultural crop experimentation is an essential prerequisite for the publication. Studies based on field experiments must show that they have been repeated (at least three times) on the same organism or have been conducted on several different varieties.