Loss of desiccation tolerance and storage behavior in germinating seeds of Senna multijuga: implications for seed germination and conservation

Rodrigues-Junior, Ailton G.; Faria, José Márcio Rocha; Vaz, Tatiana Arantes Afonso; José, Anderson Cleiton

doi:10.1007/s11056-014-9461-5

Cited by 10 publications

(7 citation statements)

References 19 publications

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“…These data are similar to the ones observed for pau-jacaré ( Figure 1F), whose seeds exhibited a drastic decrease in desiccation tolerance in the middle of phase 1, earlier than in C. langsdorffii. The loss of desiccation tolerance at the beginning of the germination was also reported for Senna multijuga seeds (Rodrigues-Junior et al, 2014), thus providing evidence that the loss of seed desiccation tolerance following the model species pattern is not universal.…”

Section: Discussionsupporting

confidence: 54%

“…Consequently, the studies were primarily focused on germinating seeds. However, in some species that produce orthodox seeds, such as Senna multijuga, Cecropia longipes, Luehea seemannii, and Ochroma pyramidale, drying of the seeds before the conclusion of the germination process resulted in seed death (Daws et al, 2007;Rodrigues-Junior et al, 2014). Drying of the seeds at imbibition phase 1 is lethal in Copaifera langsdorffii (Pereira et al, 2014) and neotropical seed species (Daws et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

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Loss of Desiccation Tolerance in Seeds of Tree Species During Germination: Theoretical and Practical Implications

et al. 2018

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Understanding the loss of desiccation tolerance is of great importance in seed technology for its implications in the development of strategies for seed conservation and seedling production. In the present work, the loss of desiccation tolerance was studied in seeds of tree species Bowdichia virgilioides, Libidibia ferrea, Cedrela fissilis, Enterolobium contortisiliquum, Handroanthus impetiginosus, and Piptadenia gonoacantha. The seeds were collected in the region of Lavras, MG, and subjected to desiccation experiments individually for each species. Imbibition curve was created for each species by measuring seed weight at regular intervals under germination conditions. Based on this information, the seeds were allowed to imbibe for a time inferred from the imbibition curve, and then allowed to dry until reaching the initial water content measured before the imbibition begun. Then, the seeds were rehydrated, and those that developed into normal seedlings were considered desiccation-tolerant. The loss of seed desiccation tolerance followed a specific pattern in each studied species, but none of the species was tolerant to desiccation after radicle protrusion. A drastic decrease in desiccation tolerance was observed in P. gonoacantha seeds at the beginning of the germination process. Under the conditions implemented in this study, the loss of desiccation tolerance in all species started at the beginning of the germination process. These results have implications in both theoretical studies (seed priming) and the practice (in seedling production).

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Section: Discussionsupporting

confidence: 54%

Section: Introductionmentioning

confidence: 99%

Loss of Desiccation Tolerance in Seeds of Tree Species During Germination: Theoretical and Practical Implications

et al. 2018

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“…Senna multijuga produces desiccation‐tolerant (Rodrigues‐Junior et al . ) and physically dormant (Rodrigues‐Junior et al . ) seeds.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity cycling in physically dormant seeds of the Neotropical tree Senna multijuga (Fabaceae)

Rodrigues-Junior

Baskin

et al. 2018

Plant Biol J

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Cycling of sensitivity to physical dormancy (PY) break has been documented in herbaceous species. However, it has not been reported in tree seeds, nor has the effect of seed size on sensitivity to PY-breaking been evaluated in any species. Thus, the aims of this study were to investigate how PY is broken in seeds of the tropical legume tree Senna multijuga, if seeds exhibit sensitivity cycling and if seed size affects induction into sensitivity. Dormancy and germination were evaluated in intact and scarified seeds from two collections of S. multijuga. The effects of temperature, moisture and seed size on induction of sensitivity to dormancy-breaking were assessed, and seasonal changes in germination and persistence of buried seeds were determined. Reversal of sensitivity was also investigated. Fresh seeds were insensitive to dormancy break at wet-high temperatures, and an increase in sensitivity occurred in buried seeds after they experienced low temperatures during winter (dry season). Temperatures ≤20 °C increased sensitivity, whereas temperatures ≥30 °C decreased it regardless of moisture conditions. Dormancy was broken in sensitive seeds by incubating them at 35 °C. Sensitivity could be reversed, and large seeds were more sensitive than small seeds to sensitivity induction. Seeds of S. multijuga exhibit sensitivity cycling to PY-breaking. Seeds become sensitive during winter and can germinate with the onset of the spring-summer rainy season in Brazil. Small seeds are slower to become sensitive than large ones, and this may be a mechanism by which germination is spread over time. Sensitive seeds that fail to germinate become insensitive during exposure to drought during summer. This is the first report of sensitivity cycling in a tree species.

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“…Other crops for which similar reports exist include grain legumes and some other species, such as Phaseolus vulgaris [33], Glycine max [49], Pisum sativum [50], Arabidopsis thaliana [51], Senna multijuga [52], and Triticum aestivum [31]. Other factors that predispose seeds to deterioration are genetic factors, seed size, and seed maturity [47,52,53]. Hence, the differences observed germination/tolerance to CD among species in this study might be attributable to some of these factors.…”

Section: Controlled Deterioration Of Seeds and Electrolyte Leakagementioning

confidence: 51%

“…The scarified seeds, which imbibed water rapidly, showed increased dead tissue and higher electrolyte leakage (which are indications of imbibition damage) and emerged poorly in the field. Other crops for which similar reports exist include grain legumes and some other species, such as Phaseolus vulgaris [33], Glycine max [49], Pisum sativum [50], Arabidopsis thaliana [51], Senna multijuga [52], and Triticum aestivum [31]. Other factors that predispose seeds to deterioration are genetic factors, seed size, and seed maturity [47,52,53].…”

Section: Controlled Deterioration Of Seeds and Electrolyte Leakagementioning

confidence: 99%

A Comparison of Water Imbibition and Controlled Deterioration in Five Orthodox Species

2022

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Orthodox seeds deteriorate even when stored in the best of conditions; hence, it is very important to monitor germination in stored seeds. To assess orthodox seed deterioration, a germination test is usually employed. This study assessed and compared seed deterioration in five orthodox species using electrolyte leakage and Fourier transform infrared spectroscopy (FTIR). The study also compared water imbibition by the test orthodox seeds. To achieve this, the seeds from three wild (Bolusanthus speciosus; Combretum erythrophyllum; Erythrina caffra) and two agricultural (Pisum sativum and Cucurbita pepo) species were imbibed between 20 layers of single-ply paper towel. The other set was subjected to controlled deterioration at 40 °C and 100% relative humidity for 32 d, with samples taken for germination and electrolyte leakage measurement at 4 d intervals. FTIR measurements were performed at 0, 20, and 32 d of controlled deterioration. The results indicated that there were some significant interspecies differences in the imbibition times and seed water contents but these were not large. In all species, uptake of water was complete between about 15 and 25 h. The wild species showed higher sensitivity to controlled deterioration. Complete loss of germinability occurred much earlier in the wild species (20 d in B. speciosus and E. caffra, and 16 d in Co. erythrophyllum) compared with 36 d for the agricultural species P. sativum and Cu. pepo. There was a negative correlation between electrolyte leakage and seed germination in all wild and agricultural species. A strong positive correlation was observed between the time of controlled deterioration, electrolyte leakage, and FTIR transmission in all the species. While controlled deterioration may help in decisions relating to the storage of orthodox seeds, the water imbibition results from this study will help to set the priming time of the species. The study reaffirms electrolyte leakage as an indicator of seed viability in P. sativum and Cu. pepo; it also recommends the use of electrolyte leakage as an indicator of seed deterioration in B. speciosus, Co. erythrophyllum, and E. caffra. The study also recommends FTIR as a tool for monitoring the germination of stored seeds of all the test species.

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Loss of desiccation tolerance and storage behavior in germinating seeds of Senna multijuga: implications for seed germination and conservation

Cited by 10 publications

References 19 publications

Loss of Desiccation Tolerance in Seeds of Tree Species During Germination: Theoretical and Practical Implications

Loss of Desiccation Tolerance in Seeds of Tree Species During Germination: Theoretical and Practical Implications

Sensitivity cycling in physically dormant seeds of the Neotropical tree Senna multijuga (Fabaceae)

A Comparison of Water Imbibition and Controlled Deterioration in Five Orthodox Species

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