Accumulation of Nitrate and Nitrite in Chilled Leaves of Rice Seedlings is Induced by High Root Temperature

Suzuki, Kensaku; Ohmori, Y.; Nagao, Manabu

doi:10.1093/pcp/pct120

Cited by 6 publications

(4 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Suzuki et al [ 5 ] also suggested that this molecule was probably nitric oxide, which to have the potential to bind to the Q A -Fe 2+ -Q B complex, thereby inhibiting electron transfer from Q A - to Q B . Nitric oxide may be produced when nitrate is accumulated and, more recently, Suzuki et al [ 59 ] described that the malfunction of photosynthesis induced by high root temperature is associated with the accumulation of nitrate and nitrite in leaves.…”

Section: Discussionmentioning

confidence: 99%

The Effects of Cold Stress on Photosynthesis in Hibiscus Plants

Paredes

Quiles

2015

PLoS ONE

View full text Add to dashboard Cite

The present work studies the effects of cold on photosynthesis, as well as the involvement in the chilling stress of chlororespiratory enzymes and ferredoxin-mediated cyclic electron flow, in illuminated plants of Hibiscus rosa-sinensis. Plants were sensitive to cold stress, as indicated by a reduction in the photochemistry efficiency of PSII and in the capacity for electron transport. However, the susceptibility of leaves to cold may be modified by root temperature. When the stem, but not roots, was chilled, the quantum yield of PSII and the relative electron transport rates were much lower than when the whole plant, root and stem, was chilled at 10°C. Additionally, when the whole plant was cooled, both the activity of electron donation by NADPH and ferredoxin to plastoquinone and the amount of PGR5 polypeptide, an essential component of the cyclic electron flow around PSI, increased, suggesting that in these conditions cyclic electron flow helps protect photosystems. However, when the stem, but not the root, was cooled cyclic electron flow did not increase and PSII was damaged as a result of insufficient dissipation of the excess light energy. In contrast, the chlororespiratory enzymes (NDH complex and PTOX) remained similar to control when the whole plant was cooled, but increased when only the stem was cooled, suggesting the involvement of chlororespiration in the response to chilling stress when other pathways, such as cyclic electron flow around PSI, are insufficient to protect PSII.

show abstract

Section: Discussionmentioning

confidence: 99%

The Effects of Cold Stress on Photosynthesis in Hibiscus Plants

Paredes

Quiles

2015

PLoS ONE

View full text Add to dashboard Cite

show abstract

“…In rice seedling (Oryza sativa L. cv. Akitakomachi) Suzuki et al reported that exposure of the tissues (root and stem) to different temperatures resulted in accumulation of nitrite in the leaves after light/dark transition [32]. It should be emphasized that accumulated nitrite can be reduced to NO by NR and the gas will be released into the air [4,44].…”

Section: Nitrite Accumulation Mechanism In Spinach Leavesmentioning

confidence: 99%

“…Even in plant physiology, the conditions where leaves accumulate nitrite in the tissue are yet unclear [31]. Many physiological studies have suggested that plants produce nitrite only under stress conditions [32,33]. However, its production mechanism is still under debate [34].…”

Section: Introductionmentioning

confidence: 99%

Dynamics of Nitrite Content in Fresh Spinach Leaves: Evidence for Nitrite Formation Caused by Microbial Nitrate Reductase Activity

Watanabe¹,

Yamasaki²

2017

J Nutr Food Sci

View full text Add to dashboard Cite

Nitrite (NO 2 -) contained in dietary foods has long been recognized for its toxicity as the causative agent of methemoglobinemia and also as a source of mutagenic nitrosamines. Because of these potential toxicities, nitrite as well as nitrate contained in foods and drinks are strictly limited by regulations in many countries. Recent studies have offered us to update our recognition of nitrite; nitrite is an important precursor for Nitric Oxide (NO) that is required for fundamental physiological activities including vasorelaxation. Although it is well established that green vegetables contain high amounts of nitrate, there has been controversy regarding the source of nitrite accumulation in fresh green vegetables. In this study, we investigated the dynamics of nitrite and nitrate contents in spinach leaf extracts to verify the mechanisms of nitrite formation. The time course of nitrite production in leaf extracts showed a reciprocal relationship with nitrate degradation, suggesting a conversion from nitrate to nitrite. The reaction strongly depended on temperature and it was suppressed at a low temperature. Sodium tungstate, a nitrate reductase enzyme inhibitor, was effective to suppress the conversion. Pre-sterilization by autoclaving or filter sterilization completely prevented the formation of nitrite as well as degradation of nitrate. We suggest that previous reports of nitrite accumulation can be attributed to microbial nitrate reductase activities that occur during the degradation spinach leaves.

show abstract

“…It recently has been shown that compared with whole plant chilling-light treatment (L/L), severer injury of leaves was induced by the treatment where only leaves but not roots were chilled (L/H) in some chilling-sensitive species, such as Oryza sativa 21 22 and Spathiphyllum wallisii 23 . The chilling injury of leaves induced by L/H is related to the malfunction of chlororespiration 24 and excess supply of water and nutrition 22 25 .…”

mentioning

confidence: 99%

Water Status Related Root-to-Shoot Communication Regulates the Chilling Tolerance of Shoot in Cucumber (Cucumis sativus L.) Plants

Zhang

Liu

Gao

et al. 2015

Sci Rep

View full text Add to dashboard Cite

Although root-to-shoot communication has been intensively investigated in plants under drought, few studies have examined root-to-shoot communication under chilling. Here we explored whether root-to-shoot communication contributes to the chilling-light tolerance of cucumber shoots and clarified the key signal involves in this communication. After leaf discs chilling-light treatment, the photoinhibitions of Photosystem I (PSI) and Photosystem II (PSII) were similar in leaf discs of two cucumber varieties (JY-3 and JC-4). When the whole plants, including roots, were chilled under light, the photosynthetic performances in JC-4 leaves decreased more seriously than that in JY-3 leaves. However, when the water status of leaves was maintained by warming roots or floating the attached leaves on water, the PSII activity and amount of PSI in the leaves of the two varieties were similar after chilling-light treatment. In addition, the differences of PSII activities and amount of PSI between the two varieties under whole plant chilling-light treatment were independent of ABA pretreatment. Above results indicate that (1) the better water status in leaves under chilling contributes to the higher chilling tolerance of JY-3; (2) the water status, rather than an ABA signal, dominates root-to-shoot communication under chilling and the chilling tolerance of cucumber shoot.

show abstract

Accumulation of Nitrate and Nitrite in Chilled Leaves of Rice Seedlings is Induced by High Root Temperature

Cited by 6 publications

References 22 publications

The Effects of Cold Stress on Photosynthesis in Hibiscus Plants

The Effects of Cold Stress on Photosynthesis in Hibiscus Plants

Dynamics of Nitrite Content in Fresh Spinach Leaves: Evidence for Nitrite Formation Caused by Microbial Nitrate Reductase Activity

Water Status Related Root-to-Shoot Communication Regulates the Chilling Tolerance of Shoot in Cucumber (Cucumis sativus L.) Plants

Contact Info

Product

Resources

About