Sugarcane Response to Water-Deficit Stress during Early Growth on Organic and Sand Soils

SUMMARYThe relationships between physiological variables and sugarcane productivity under water deficit conditions were investigated in field studies during 2005 and 2006 in Weslaco, Texas, USA. A total of 78 genotypes and two commercial varieties were studied, one of which was drought-tolerant (TCP93-4245) and the other drought-sensitive (TCP87-3388). All genotypes were subjected to two irrigation regimes: a control well-watered treatment (wet) and a moderate water-deficit stress (dry) treatment for a period of 90 days. Maximum quantum efficiency of photosystem II (Fv/Fm), estimated chlorophyll content (SPAD index), leaf temperature (LT), leaf relative water content (RWC) and productivity were measured. The productivity of all genotypes was, on average, affected negatively; however, certain genotypes did not suffer significant reduction. Under water deficit, the productivity of the genotypes was positively and significantly correlated with Fv/Fm, SPAD index and RWC, while LT had a negative correlation. These findings suggest that genotypes exhibiting traits of high RWC values, high chlorophyll contents and high photosynthetic radiation use efficiency under low moisture availability should be targeted for selection and variety development in programmes aimed at improving sugarcane for drought prone environments.

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Physio-morphological traits and osmoregulation strategies of hybrid maize (Zea mays) at the seedling stage in response to water-deficit stress

PROTOPLASMA ◽

10.1007/s00709-021-01707-0 ◽

2021 ◽

Author(s):

Piyanan Pipatsitee ◽

Cattarin Theerawitaya ◽

Rujira Tiasarum ◽

Thapanee Samphumphuang ◽

Harminder Pal Singh ◽

...

Keyword(s):

Zea Mays ◽

Water Deficit ◽

Morphological Traits ◽

Seedling Stage ◽

Water Deficit Stress ◽

Hybrid Maize ◽

Response To Water

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Field Crop Response to Water Deficit Stress: Assessment Through Crop Models

Advances in Crop Environment Interaction ◽

10.1007/978-981-13-1861-0_11 ◽

2018 ◽

pp. 287-315

Author(s):

Rajkumar Dhakar ◽

M. A. Sarath Chandran ◽

Shivani Nagar ◽

V. Visha Kumari ◽

A. V. M. Subbarao ◽

...

Keyword(s):

Water Deficit ◽

Water Deficit Stress ◽

Field Crop ◽

Crop Response ◽

Stress Assessment ◽

Crop Models ◽

Response To Water

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Plant Response to Water-deficit Stress

Encyclopedia of Life Sciences ◽

10.1002/9780470015902.a0001298.pub2 ◽

2007 ◽

Cited By ~ 4

Author(s):

Elizabeth A Bray

Keyword(s):

Water Deficit ◽

Plant Response ◽

Water Deficit Stress ◽

Response To Water

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Trigonelline Accumulation in Leaves of Panicum virgatum Seedlings

Natural Product Communications ◽

10.1177/1934578x1400900826 ◽

2014 ◽

Vol 9 (8) ◽

pp. 1934578X1400900 ◽

Cited By ~ 1

Author(s):

Lauren M. Schwartz ◽

Andrew J. Wood ◽

David J. Gibson

Keyword(s):

Water Deficit ◽

Tallgrass Prairie ◽

Panicum Virgatum ◽

Water Deficit Stress ◽

Significant Difference ◽

Moisture Treatment ◽

Relative Water ◽

Tallgrass Prairies ◽

Response To Water ◽

Physiological Markers

Panicum virgatum is a dominant, native, perennial species found in the tallgrass prairie. In this study, we report the biosynthesis and accumulation of trigonelline (TRG) in leaves of P. virgatum in response to water-deficit stress. Once established, half of the seedlings underwent a drought stress treatment while the other half were watered daily (control). Relative water content (RWC) and trigonelline (TRG) concentrations were determined. RWC showed an interaction between moisture treatment and time, in which upland cultivars had the highest mean RWC compared with the lowland cultivars. The moisture treatments showed a significant difference in TRG concentration across all P. virgatum cultivars, which ranged from 0.5–31.8 μg/gFW−1. There was a divergence in TRG accumulation between upland and lowland cultivars in relation to RWC. This study is the first to report TRG accumulation in the grass P. virgatum, and to test for differences in TRG with respect to water-deficit stress among cultivars. The effect of soil moisture levels on cultivars may be important in making an informed selection and the response of P. virgatum and other dominant grasses should be considered as a potential filter in tallgrass prairies for restoration. Physiological markers such as TRG and RWC can aid in this decision making process.

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Consequences of Seed Priming with Salicylic Acid and Hydro Priming on Smooth Vetch Seedling Growth under Water Deficiency

Journal of Agricultural Science ◽

10.5539/jas.v9n12p259 ◽

2017 ◽

Vol 9 (12) ◽

pp. 259

Author(s):

Amin Namdari ◽

Abolfazl Baghbani

Keyword(s):

Salicylic Acid ◽

Water Deficit ◽

Seedling Growth ◽

Glycine Betaine ◽

Soluble Sugars ◽

Early Growth ◽

Water Deficit Stress ◽

Growth Stages ◽

Water Deficiency ◽

Available Water

Due to low rainfall at early autumn, smooth vetch seedling growth in rain-fed lands often is limited by water deficit stress yet the data regarding the reactions of smooth vetch to water deficit at early growth stages are pretty rare. The objective of current study was to examine possibility of using priming treatments (hydro priming and priming salicylic acid) to alleviate the inhibitory effect of water deficiency during early growth of Smooth Vetch. In this respect, seeds were soaked in distilled water (hydro priming) or 0.5 mM solution of SA for 36 h at 10 °C then dried back to original moisture content. Pots were irrigated for 25 days at four levels of available water containing field capacity (FC), 75% FC, 50% FC and 25% FC. In general, seedling emergence and early growth were markedly limited by increasing water deficiency. However, priming treatments particularly with SA caused considerable improvement in either emergence or growth of seedlings (dry weight, length). The obtained results showed that primed samples exhibited higher accumulation of proline, glycine betaine (GB) under all levels of available water except 100% FC and also higher total soluble sugars (TSS) and trehalose under severe water deficit (25% FC). SA primed samples had higher relative water content especially under higher levels of water deficiency. The more balanced water status within SA primed samples also was accompanied with higher accumulation of proline and glycine betaine. There were significant differences between two priming treatments in terms of proline and GB content within seedlings and SA priming considerably increased proline and GB accumulation. In contrast to proline and GB, TSS and trehalose content wasn’t influenced by SA treatment and both hydro and SA primed samples showed statistically similar quantities.

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