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© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

Simple Summary

Drought is considered a critical threat to crop growth and sustainable agriculture worldwide, and it also greatly impacts insect development and population growth. Brown planthopper (BPH), Nilaparvata lugens (Stål), is the predominant rice crop pest in China, and the damaging effects of BPH are enhanced by its strong migratory and reproductive capacities. Our results provide useful information about the effect of drought stress on the poor population growth and negative physiological changes in BPH. Negative changes to water balance and osmotic pressure can cause a decline in the quality of BPH; the GST content of BPH feeding on drought-stressed rice was significantly higher than BPH feeding on non-stressed control plants, and the length of flight muscle sarcomeres and mitochondrial content were decreased in BPH feeding on drought-stressed rice. These findings suggest that water management greatly impacts the physiology and population growth of BPH, and provide a basis for understanding physiological and population-wide responses in BPH during drought stress, which may be helpful in understanding the relationship between drought stress and BPH infestation.

Abstract

Drought stress greatly impacts insect development and population growth. Some studies have demonstrated increased reproductive capacity in drought-stressed insects; however, physiological changes in the brown planthopper (BPH), Nilaparvata lugens (Stål), during periods of drought are unclear. In this study, BPH fed on drought- stressed rice had lower population numbers than BPH feeding on non-stressed rice. Water content, osmotic pressure of hemolymph and total amino acid content of BPH were significantly lower when BPH fed on drought-stressed rice compared to the non-stressed control; however, glucose content and glutathione S-transferase (GST) activity were significantly higher in BPH fed on drought-stressed rice. The expression of Vitellogenin and Exuperantia in BPH fed on drought-stressed rice was higher than that in BPH feeding on non-stressed control plants. The size of myofibrils and the abundance of mitochondria in BPH flight muscles were significantly lower in BPH fed on drought-stressed rice compared to non-stressed plants. These results indicate that water management impacts the physiology of BPH, which may be useful in understanding the relationship between drought stress and this damaging herbivore.

Details

Title
Physiological and Population Responses of Nilaparvata lugens after Feeding on Drought-Stressed Rice
Author
Liang, Xinyan 1   VIAFID ORCID Logo  ; Chen, Lin 1 ; Lan, Xiaoying 1 ; Liao, Guangrong 1 ; Feng, Ling 1 ; Li, Jitong 1 ; Fan, Wenyan 1 ; Wang, Shuang 1 ; Liu, Jinglan 2   VIAFID ORCID Logo 

 College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China; [email protected] (X.L.); [email protected] (L.C.); [email protected] (X.L.); [email protected] (G.L.); [email protected] (L.F.); [email protected] (J.L.); [email protected] (W.F.); [email protected] (S.W.) 
 College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China; [email protected] (X.L.); [email protected] (L.C.); [email protected] (X.L.); [email protected] (G.L.); [email protected] (L.F.); [email protected] (J.L.); [email protected] (W.F.); [email protected] (S.W.); Joint International Research Laboratory of Agriculture and AgriProduct Safety of the Ministry of Education, Yangzhou University, Yangzhou 225009, China 
First page
355
Publication year
2022
Publication date
2022
Publisher
MDPI AG
e-ISSN
20754450
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2652977455
Copyright
© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.