Staying alive or going to die during terminal senescence– An enigma surrounding yield stability

التفاصيل البيبلوغرافية
العنوان: Staying alive or going to die during terminal senescence– An enigma surrounding yield stability
المؤلفون: Rajeev N. Bahuguna, Nese Sreenivasulu, Nicolaus von Wirén, Krishna S.V. Jagadish, Polavarapu B. Kavi Kishor
المصدر: Frontiers in Plant Science, Vol 6 (2015)
Frontiers in Plant Science
بيانات النشر: Frontiers Media S.A., 2015.
سنة النشر: 2015
مصطلحات موضوعية: carbohydrate remobilization, Abiotic component, Senescence, Drought stress, senescence, business.industry, Abiotic stress, Stay-green, Yield (finance), food and beverages, Cereals, Review, Plant Science, Biology, lcsh:Plant culture, Heat stress, Biotechnology, Anthesis, Trait, Grain quality, lcsh:SB1-1110, Photosynthesis, business
الوصف: Breeding programs with the aim to enhance yield productivity under abiotic stress conditions during the reproductive stage of crops is a top priority in the era of climate change. However, the choice of exploring stay-green or senescence phenotypes, which represent an opposing physiological bearing, are explored in cereal breeding programs for enhanced yield stability to a different extent. Thus, the consideration of stay-green or senescence phenotypes is still an ongoing debate and has not been comprehensively addressed. In this review, we provide arguments for designing a target phenotype needed to encounter mitigate abiotic stresses during pre- and post-anthesis in cereals with a focus on hormonal balances regulating stay-green phenotype versus remobilization. The two major hypothesis for grain yield improvement are (i) the importance of the stay-green trait to elevate grain number under pre-anthesis and anthesis stress and (ii) fine tuning the regulatory and molecular physiological mechanisms to accelerate nutrient remobilization to optimize grain quality and seed weight under post-anthesis stress. We highlight why a cautious balance in the phenotype design is essential. While stay-green phenotypes promise to be ideal for developing stress-tolerant lines during pre-anthesis and fertilization to enhance grain number and yield per se, fine-tuning efficient remobilizing behaviour during seed filling might optimize grain weight, grain quality and nutrient efficiency. The proposed model provides novel and focused directions for cereal stress breeding programs to ensure better seed-set and efficient grain-filling in cereals under terminal drought and heat stress exposure.
اللغة: English
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e51f1c1862eddc4edcf02cb513eb9aa0Test
http://journal.frontiersin.org/Journal/10.3389/fpls.2015.01070/fullTest
حقوق: OPEN
رقم الانضمام: edsair.doi.dedup.....e51f1c1862eddc4edcf02cb513eb9aa0
قاعدة البيانات: OpenAIRE