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Subject: search.filters.subject.Grasspea

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    Grasspea, a critical recruit among neglected and underutilized legumes, for tapping genomic resources
    (Elsevier B.V., 2021) Rathi, Divya; Chakraborty, Subhra; Chakraborty, Niranjan
    Environmental perturbations are persistent threats to sustainable agriculture, and thus recruitment of resilient crops, especially legumes, exhibiting agronomically important traits has become a priority for plant biologists. It is of utmost importance that the neglected and underutilized legumes (NULs) are identified and utilized as source of germane genes and gene-products, through concerted research platforms. In the present article, we analyzed the current status of NULs with specific emphasis to the potent utility of grasspea owing to its unique characters including stress adaptation, nutritional superiority and ease of cultivation. We have highlighted the landmarks in the history of grasspea, delineating the rapid progress achieved in grasspea biology during the past decades. Despite possession of a neurotoxic compound, β-N-oxalyl-L-α,β-diaminopropionic acid (β-ODAP), this neglected legume outshines most food crops with its distinct physicochemical attributes, health and agricultural benefits and resilience to environmental constraints. With the availability of genome sequence, grasspea is now established as an appropriate genetic resource for sustainable agriculture and phytoremediation rendering its genes, proteins and metabolites for targeted genetic manipulation. We conclude that grasspea would serve as a resource for plant translational genomics (TG) research, particularly resilience of legumes to environmental challenges.
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    Transcriptome profiling illustrates expression signatures of dehydration tolerance in developing grasspea seedlings
    (Springer Nature, 2019) Rathi, Divya; Gayali, Saurabh; Pareek, Akanksha; Chakraborty, Subhra; Chakraborty, Niranjan
    Main conclusion This study highlights dehydration-mediated temporal changes in physicochemical, transcriptome and metabolome profles indicating altered gene expression and metabolic shifts, underlying endurance and adaptation to stress tolerance in the marginalized crop, grasspea. Grasspea, often regarded as an orphan legume, is recognized to be fairly tolerant to water-defcit stress. In the present study, 3-week-old grasspea seedlings were subjected to dehydration by withholding water over a period of 144 h. While there were no detectable phenotypic changes in the seedlings till 48 h, the symptoms appeared during 72 h and aggravated upon prolonged dehydration. The physiological responses to water-defcit stress during 72–96 h displayed a decrease in pigments, disruption in membrane integrity and osmotic imbalance. We evaluated the temporal efects of dehydration at the transcriptome and metabolome levels. In total, 5201 genes of various functional classes including transcription factors, cytoplasmic enzymes and structural cell wall proteins, among others, were found to be dehydration-responsive. Further, metabolome profling revealed 59 dehydration-responsive metabolites including sugar alcohols and amino acids. Despite the lack of genome information of grasspea, the time course of physicochemical and molecular responses suggest a synchronized dehydration response. The cross-species comparison of the transcriptomes and metabolomes with other legumes provides evidence for marked molecular diversity. We propose a hypothetical model that highlights novel biomarkers and explain their relevance in dehydration-response, which would facilitate targeted breeding and aid in commencing crop improvement eforts.