Journal Article•
Aftermath of terminal heat stress on Indian mustard (Brassica juncea L.) : A brief review
15 Feb 2020-Journal of Oilseed Brassica (Society for Rapeseed-Mustard Research)-Vol. 11, Iss: 1, pp 1-18
TL;DR: In this review, detrimental effects of terminal heat stress on Indian mustard are discussed in terms of morphophysiological, yield and biochemical attributes.
Abstract: Abiotic stresses are often interrelated, either individually or in combination, they cause morphological, physiological, biochemical and molecular changes that adversely affect plant growth, productivity and ultimately seed yield. Heat, drought, cold and salinity are the major abiotic stresses that induce severe cellular damage in plant species, including crop plants. High temperature especially terminal heat stress is the second most important stress next to drought. It has negative effect on plant growth due to the harmful effect on plant development. It is a critical factor for plant productivity also. Generally plants respond to heat stress through developmental, biochemical and physiological changes and the type of response depends on several factors such as stress intensity, stress duration and genotype. It poses serious threats to the sustainability of crop production. The increasing threat of climate change is already having a substantial impact on agricultural production worldwide, waves cause significant yield losses with great risks for future global food security. In this review, detrimental effects of terminal heat stress on Indian mustard are discussed in terms of morphophysiological, yield and biochemical attributes.
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TL;DR: In this article , a study was conducted to reveal how sowing time and changing field temperature influence on the regulation of oxidative stress indicators, antioxidant enzymes activity, soluble sugars (SS), and amino acids (AA) in Indian Mustard.
Abstract: The impact of elevated temperature at the reproductive stage of a crop is one of the critical limitations that influence crop growth and productivity globally. This study was aimed to reveal how sowing time and changing field temperature influence on the regulation of oxidative stress indicators, antioxidant enzymes activity, soluble sugars (SS), and amino acids (AA) in Indian Mustard. The current study was carried out during the rabi 2017–2018 and 2018–2019 where, five varieties of mustard viz. Pusa Mustard 25 (PM-25) (V1), PM-26 (V2), BPR-541-4 (V3), RH-406 (V4), and Urvashi (V5) were grown under the field conditions on October 30 (normal sowing; S1), November 18 (late sowing; S2) and November 30 (very late sowing; S3) situations. The S1 and S3 plants, at mid-flowering stage, showed a significant variation in accumulation of SS (8.5 and 17.3%), free AA (235.4 and 224.6%), and proline content (118.1 and 133%), respectively, and played a crucial role in the osmotic adjustment under stress. The results showed that S3 sowing, exhibited a significant induction of the hydrogen peroxide (H2O2) (110.2 and 86.6%) and malondialdehyde (23.5 and 47.5%) concentrations, respectively, which indicated the sign of oxidative stress in plants. Interestingly, the polyphenol oxidase, peroxidase, superoxide dismutase, and catalase enzyme activities were also significantly increased in S3 plants compared to S1 plants, indicating their significant roles in ameliorating the oxidative stress. Furthermore, the concentration of fatty acid levels such as palmitic, stearic, oleic, and linoleic acids level also significantly increased in S3 plants, which influenced the seed and oil quality. The study suggests that the late sowing significantly impaired the biochemical mechanisms in Indian mustard. Further, the mustard variety V4 (RH-406) was found to be effective for cultivation as well as environmental stress adoption in Indian soils, and it could be highly useful in breeding for developing heat-tolerant genotypes for ensuring the food security.
7 citations
TL;DR: The existence of arbuscular mycorrhizal fungi (AMF), on the earth, is about 600 million years ago and its role in agriculture is still unclear.
Abstract: Mycorrhizae are an important player in the ecosystem. Three
different types of mycorrhizae are arbuscular mycorrhizae (AM),
ectomycorrhizae (EcM), and ericoid mycorrhizae...
2 citations
Cites background from "Aftermath of terminal heat stress o..."
...Plant susceptibility to high temperature is observed in vegetative and reproductive development [74]....
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TL;DR: In this paper , the authors investigated the impact of thermopriming on heat stress response of 16 different cultivated, agronomically important varieties of Brassica juncea.