Changes in cell‐wall carbohydrates and lignin of some forage‐type millets as affected by growth stage

Singh, Inderjit; Dogra, K. K.; Dua, Saroj

doi:10.1002/jsfa.2740260919

Cited by 3 publications

(1 citation statement)

References 13 publications

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“…Recent studies showed that lignification could occur with the assistance of living neighboring cells (Barros et al, 2015 ; Blokhina et al, 2019 ; Słupianek et al, 2021 ). Lignification might be related to xylem vulnerability (Awad et al, 2012 ; Lima et al, 2018 ; Pereira et al, 2018 ), so we may consider seasonal lignification (Barton et al, 2019 ; Markovic et al, 2007 ; Singh et al, 1975 ) as a possible driver of the P 50 adjustment. Finally, the explanation could involve the pit membrane thickness that has been shown to change during the season (Sorek et al, 2021 ).…”

Section: Discussionmentioning

confidence: 99%

Seasonal adjustment of leaf embolism resistance and its importance for hydraulic safety in deciduous trees

Sorek

Greenstein

Hochberg

2022

Physiologia Plantarum

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Embolism resistance is often viewed as seasonally stable. Here we examined the seasonality in the leaf xylem vulnerability curve (VC) and turgor loss point (ΨTLP) of nine deciduous species that originated from Mediterranean, temperate, tropical, or sub‐tropical habitats and were growing on the Volcani campus, Israel. All four Mediterranean/temperate species exhibited a shift of their VC to lower xylem pressures (Ψx) along the dry season, in addition to two of the five tropical/sub‐tropical species. In three of the species that exhibited VC seasonality, it was critical for avoiding embolism in the leaf. In total, seven out of the nine species avoided embolism. The seasonal VC adjustment was over two times higher as compared with the seasonal adjustment of ΨTLP, resulting in improved hydraulic safety as the season progressed. The results suggest that seasonality in the leaf xylem vulnerability is common in species that originate from Mediterranean or temperate habitats that have large seasonal environmental changes. This seasonality is advantageous because it enables a gradual seasonal reduction in the Ψx without increasing the danger of embolism. The results also highlight that measuring the minimal Ψx and the VC at different times can lead to erroneous estimations of the hydraulic safety margins. Changing the current hydraulic dogma into a seasonal dynamic in the vulnerability of the xylem itself should enable physiologists to understand plants' responses to their environment better.

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Section: Discussionmentioning

confidence: 99%

Seasonal adjustment of leaf embolism resistance and its importance for hydraulic safety in deciduous trees

Sorek

Greenstein

Hochberg

2022

Physiologia Plantarum

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Oxalate accumulation in napier grass and pearl millet × napier grass interspecific hybrids in relation to nitrogen nutrition, irrigation and temperature

Kipnis

Dabush

1988

J Sci Food Agric

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A B S T R A C TThe oxalate content of napier grass and of pearl milletxnapier grass interspecific hybrids was studied in plants grown in midsummer in the field and in a phytotron under three temperature regimes. The plants in the field were irrigated every 3, 7 or 14 days and given at each irrigation a heavy application of nitrogen, not less than 5 kg N ha-' day-'. The plants in the phytotron were irrigated daily with a complete nutrient solution containing 200 mg 1-' of nitrogen. The highest total and soluble oxalate contents in the dry matter of fieldgrown plants were 2.6 % and 1.3 %, respectively. The oxalate status of the plant was not affected by the irrigation or N fertilisation. I n contrast, plants grown in the phytotron accumulated as much as 4.4 % of total and 3.4 % of soluble oxalates, and both decreased with advancing maturity irrespective of the temperature regime. The content of sodium +potassium in the dry matter was linearly correlated with oxalate content (r2 = 0.78) in the pooled data of all four experiments reported herein. There was no change in oxalate with N content above 2.0 % of the dry matter. Below that level oxalate increased steeply with N content. However, in this range, N content is linearly correlated with ( N a + K ) content, and so its relation with oxalate is indirect.Oxalate levels in the leaves were higher than in the siems and decreased in both plant parts with advancing maturity. Only small differences in oxalates were found between the hybrids tested. Napier grass accumulated more oxalate in the stem than its F , hybrid, both having higher concentrations in *Contribution from the Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel No. 1999-E, 1987 series. 21 1 J . Sci. Food Agric. 0022-5142/88/$03.50 0 1988 Society of Chemical Industry. Printed in Great Britain 212 T Kipnis, L Dabush younger stem internodes. No differences in oxalate levels were found between the leaves of the parent grass and its hybrid.I t is concluded that a hazardous concentration of oxalate in millet x napier hybrids is unlikely even under intensive N fertilisation. Consequently, consideration of oxalate accumulation need not be a constraint in breeding jbr improved hybrids of this grass.

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Interconversion of Free Sugars, Starch and the activity of Invertase and Sucrose-UDP (ADP) Glucosyl Transferase in the Storage Organ of a Pennisetum hsybrid

Singh

Arya

Bhatia

1980

Biochemie und Physiologie der Pflanzen

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Changes in cell‐wall carbohydrates and lignin of some forage‐type millets as affected by growth stage

Cited by 3 publications

References 13 publications

Seasonal adjustment of leaf embolism resistance and its importance for hydraulic safety in deciduous trees

Seasonal adjustment of leaf embolism resistance and its importance for hydraulic safety in deciduous trees

Oxalate accumulation in napier grass and pearl millet × napier grass interspecific hybrids in relation to nitrogen nutrition, irrigation and temperature

Interconversion of Free Sugars, Starch and the activity of Invertase and Sucrose-UDP (ADP) Glucosyl Transferase in the Storage Organ of a Pennisetum hsybrid

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